Park Avenue main line
The Park Avenue main line, which consists of the Park Avenue Tunnel and the Park Avenue Viaduct, is a railroad line in the New York City borough of Manhattan, running entirely along Park Avenue. It carries four tracks of the Metro-North Railroad underground from Grand Central Terminal at 42nd Street to a portal at 97th Street and via a full viaduct north of 99th Street and continues over the Harlem River into the Bronx over the Park Avenue Bridge. During rush hours, Metro-North uses three of the four tracks in the peak direction.
|Park Avenue main line|
Looking south into the Park Avenue Tunnel.
|Locale||New York City|
|Termini||Grand Central Terminal|
Mott Haven Junction
|Services||Harlem Line, Hudson Line, New Haven Line|
|Number of tracks||4|
|Track gauge||4 ft 8 1⁄2 in (1,435 mm) standard gauge|
Originally constructed in the mid-19th century as a New York and Harlem Railroad route, the Park Avenue main line was initially a street railroad and ran to what is now Lower Manhattan. It was gradually truncated through the 1860s, until Grand Central Depot was opened at 42nd Street in 1871. The line was placed in a grade-separated structure in the late 19th century as part of the Fourth Avenue and Park Avenue Improvement projects, and was electrified in the first decade of the 20th century as part of the construction of Grand Central Terminal. Since then, several minor improvement projects have been made along the main line.
The Park Avenue main line originates at Grand Central Terminal to the south, which is located at 42nd Street. It consists of various train yards and interlockings between 42nd and 59th Streets, where it narrows to four tracks. At this location, the surrounding streets are suspended over the Park Avenue line via various viaducts. This section is known as the Grand Central Trainshed:63 The line consists of 47 platform tracks between 45th and 51st Streets, and from 51st to 57th Streets, it consists of ten tracks.:116
The line runs in two parallel tunnels, each with two tracks, from 59th to 97th Streets. Initially, the line entered fully enclosed brick tunnels between 67th and 71st Streets, and between 80th and 96th Streets. The remainder of this segment was located in a "beam tunnel" structure, which were mostly open-air, except where cross-streets traversed the cut on steel-beam bridges.:3:85 At 97th Street, the line rises onto a viaduct and continues above the median of Park Avenue until it reaches 132nd Street. There, the line crosses the Park Avenue Bridge, a vertical lift bridge, and traverses the Harlem River. The line continues into the Bronx where it diverges into the Hudson Line and the Harlem Line. Internally, the MTA designates the entire Park Avenue main line south of the Harlem Line's split as part of the Hudson Line.
The Harlem Line in its current form originated from the New York and Harlem Railroad (NY&H), which was the first streetcar company in the United States and in the world. It was franchised on April 25, 1831 to run between the original city core in Lower Manhattan to the suburb of Harlem, several miles to the north on Manhattan Island. The railroad's charter allowed the line to run between 23rd Street and any point on the Harlem River between Eighth and Third Avenues, with a branch running to the Hudson River, encompassing most of the island.:5–7:2
While the company wanted to run the line as a steam line, the city made it use horsepower south of 14th Street.:3 On September 13, 1831, the Board of Directors of the railroad approved its route along Fourth Avenue (later renamed Park Avenue) from 23rd Street to the Harlem River. On April 6, 1832, the railroad's charter was amended to allow the line to be extended south to 14th Street.:8–10
On May 2, 1832, the City Common Council secretly granted the railroad the right to lay track along Broadway to City Hall and Bowling Green. The general public objected once they found out, and a fraudulent map was circulated at the time, showing that the railroad would take up 23 feet (7.0 m) of the street when it really would only take up 5 feet (1.5 m). Newspaper editors also objected to the railroad's plan. In spring 1833, the railroad published a pamphlet titled "A Statement of Facts in Relation to the Origin, Progress, and Prospects of the New-York and Harlem Railroad Company" to refute objections to their plan. On March 1, 1833, a meeting was held in Tammany Hall concerning the issue. At the meeting, cabdrivers and cab owners came out against the railroad. After the meeting, the crowd tore up some of the railroad's track, and the council withdrew its Broadway agreement with the railroad. The railroad was eventually extended downtown in 1839, but along a different route.:6
Ground was broken on the line's construction on February 23, 1832 at Murray Hill on Fourth Avenue. At the ceremony, Vice President of the railroad John Mason hinted at the railroad's ambitions, saying that while the railroad's principal objective was local, its higher importance was to get to Albany.:3 In 1832 the company was given permission to raise its stock limit to $500,000. That November, two horsecars built by John Stephenson were ready for operation, both of which were named after the railroad's president ("John Mason" and "President").:4
On April 27, 1837, an act was passed in the State Legislature to widen Fourth Avenue between 32nd Street and the Harlem River to provide room for the railroad. The street was widened by 20 feet (6.1 m) on either side, making the street 140 feet (43 m) wide. The company ceded the title for the land that would be occupied by Fourth Avenue to the city in exchange for permission to occupy it.:6 In that same year, the railroad purchased six city lots at Fourth Avenue and 26th Street for $7,000 for the construction of car barns and stables.:7 A tunnel stretching 596 feet (182 m) was completed through Prospect Hill, one of the highest points on the East Side of Manhattan, between modern 92nd Street and 95th Street, in 1837. The New York City Landmarks Preservation Commission claims that this is the oldest railroad tunnel in the United States.:5–6
The first section, along Bowery from Prince Street north to 14th Street, consisting of .85 miles (1.37 km), opened to the public on November 26, 1832.:8 On that day, a demonstration showing the car's braking ability was conducted, but one horsecar inadvertently rear-ended another with no serious injuries. This might have been the first rear-end collision in the United States.:5 Service was then extended northward along Fourth Avenue to 32nd Street on June 10, 1833. Work on the Murray Hill rock cut began in autumn 1833 and was completed in 1834, and service along a 4.432 miles (7.133 km)-long segment to 85th Street in Yorkville opened on May 1, 1834. Service ran every 15 minutes between 5 a.m. and 8 p.m., and ran every 60 minutes to 10 p.m.. A one-way fare cost 12.5 cents.:7 Service was extended 2 miles (3.2 km) north, finally reaching Harlem on October 26, 1837, with the Yorkville Tunnel constructed to reach this point. At the time, Harlem was a small suburb of the city.:13
Service was also extended further south. On May 4, 1839, the line was extended south along Bowery, Broome Street and Centre Street to City Hall at Centre Street and Park Row. Service was extended south on November 26, 1852 along Park Row to Astor House at Park Row and Broadway. In 1851, work began to convert the Murray Hill rock cut into a tunnel, and in October of that year the City Common Council ordered that a 40 feet (12 m)-wide planted median be installed atop the tunnel between 34th Street and 38th Street. Real estate developers who purchased adjacent lots named this section of Fourth Avenue, Park Avenue, which would later be applied to the remainder of the street. The development of the area increased once the rock cut was decked over.
On October 6, 1871, the depot that the line used was changed from being at 26th Street and Fourth Avenue to Grand Central Depot at 42nd Street.:27 Since there were originally no grade-separated crossings of the railroads between 42nd and 59th Streets, there were frequent accidents; seven people died within 12 days of the move to Grand Central.
On April 1, 1873, the NY&H was leased for 401 years to the New York Central and Hudson River Railroad (later New York Central Railroad). The line then became the Harlem Division of the New York Central. The lease did not include the portion of the line using horse cars. Horse cars were replaced with an underground trolley system in 1897 when it was leased to the Metropolitan Street Railway Company.:25–26
Fourth Avenue ImprovementEdit
Legislation was passed in 1872, requiring that 4.25 miles (6.84 km) of NY&H tracks between Grand Central and the Harlem River be placed underground. The law set up a Board of Engineers to manage the project, which was known as the Fourth Avenue Improvement.:6 The law stated that the authorization for two additional tracks was given "for the purpose of facilitating rapid transit and accommodating local traffic": these tracks were built on the same level, and as part of the project, four local stations were built.:73
The project's cost was split between the New York Central, run by Commodore Vanderbilt, and New York City, whose payment of $3.2 million was to be made up from increased taxes from future development. The project was divided into three sections: 45th Street to 49th Street, 49th Street to 79th Street, and 79th Street to the Harlem River. The line was sunk into a tunnel between 59th Street and 96th Street through Mount Pleasant, known as the Yorkville Tunnel. The 4,563 feet (1,391 m)-long section in the Harlem flats between 98th Street and midway between 115th and 116th Streets was built as a stone viaduct, and reached its highest point at 114th Street. The stone viaduct surrounded earth embankment.
To the north of this section, from 125th Street to 130th Street at the Harlem River, the line was constructed below grade. Arched brick tunnels were built wherever sufficient room allowed for it. Beam tunnels were constructed where the headway was too small for an arched tunnel, and where room did not allow for that, open cuts were constructed. The 550 feet (170 m) rock tunnels were built between 92nd Street and the north side of 94th Street. Between 48th Street and 56th Street, the line was placed into a shallow open cut. To allow people and vehicles to cross over the rail line, eight pedestrian bridges were built over the line between 45th Street and 56th Street, and vehicular overpasses were built at 45th Street and 48th Street.:4 To cover the frequent openings between 50th Street and 96th Street for ventilation, the roadway's center was landscaped and fenced off. These malls were narrowed significantly in the early 1930s to accommodate additional lanes of traffic. These malls and the street's great width distinguish the street above, and contribute to Park Avenue's identity as a sought-after residential address.:4, 20
Work on the project began in fall 1872. The first contract was awarded to Fairchild and Ward and the Watson Manufacturing Company for the section between 45th Street and 49th Street. The preexisting track level in this section was maintained as the streets crossed over the line via iron bridges. The project north of 48th Street was completed by Dillon, Clyde & Company, which submitted the winning bid of $6,395,070. The contract for the project had been awarded on August 1, 1872. The contract for the section between 79th Street and the Harlem River was awarded to them on November 11. On January 14, 1873, the contract for the work between 49th Street and 79th Street was awarded to Dillon, Clyde & Company, which provided the only bid lower than that expected by the New York City Board of Estimate. The contract called for the project's completion in two years. This section had been put up for bid, but since none of the bids were satisfactory, the bidding process was reopened.
To allow trains to continue running during the project's construction, the tracks between 120th Street and the Harlem River were moved to the east side of the river. On January 5, 1873, the tracks between 116th Street and 120th Street were moved from the center of Fourth Avenue to the east side. In December 1872, shafts were sunk at 91st and 93rd Streets and two tunnels were being built alongside the old tunnel. The tunnels were to be completed in September 1873. A temporary trestle bridge was constructed from 97th Street to 120th Street for $85,000. In May 1873, temporary tracks were placed on the west side of Fourth Avenue; trains went over Lenox Hill instead of through the tunnel.
In 1875, the line was grade-separated and put in an open cut and a viaduct between Grand Central and the Harlem River to reduce pedestrian deaths and to increase speeds. The confluence of tracks to the north of Grand Central was considered to be the city's "most fearful death-trap" by The New York Times, and large meetings were held to protest the deaths caused by collisions between trains and pedestrians. A compromise was made to widen the right-of-way to four tracks and to grade-separate the line, with the city chipping in half of the project's $6 million cost. The city was compelled to pay half of the cost by legislation passed in 1872 by the New York State Legislature. New York City Mayor William Frederick Havemeyer in June 1874 refused to sign warrants in payment for the project as he believed that the Legislature's act was unconstitutional. He had signed the warrants until this point, when 2/3 of the work was completed.
On May 3, 1875, the first section of the improvement between 56th Street and 94th Street was placed in full revenue service, running through the cut south of the Yorkville Tunnel. On June 20, the entire improvement opened, and the first trains from Grand Central to the Harlem River were witnessed by large crowds of spectators. That morning, new rails and ties were installed between 96th Street and 33rd Streets, and the old track and trestle were demolished. The first train, the St. Louis Express, due at 12:30 p.m., arrived late at 1:50 p.m. due to the work. Masonry work continued to be done to lengthen the tunnel at Yorkville down to 80th Street, arching over the tracks. The tracks were not yet ballasted, forcing trains to run slowly. The side tracks to be used for local rapid transit trains were not yet laid, and the passenger stations at 59th Street, 72nd Street, 86th Street, 110th Street and 125th Street were not yet built. At this time, local rapid transit trains were expected to begin operation by September 1875 and were to serve stations yet under construction. The rolling stock for the local trains were to be much lighter than those used on the through trains.
On May 15, 1876, partial rapid transit began on the Harlem Line, with sixteen trains a day running between Grand Central Depot and William's Bridge. These trains made all stops between Grand Central and William's Bridge, with the exception of Jerome Park, which was skipped by half of trains. This was in addition to eight regular trains per day that stopped at William's Bridge. Two new stations were opened at 86th Street and 110th Street, both being exclusively served by the rapid transit service. However, much to the dissatisfaction of local residents, the 59th Street and 72nd Street stations did not open. With horse cars running on Second Avenue, Third Avenue, and Fourth Avenue, local residents around the 72nd Street station were not willing to go all the way to the 86th Street station. Loud daily complaints were made to William Vanderbilt, urging him to equip these two stations on the line, which was paid in half by the city's taxpayers. A newspaper supposed that the station could be fitted for less than $500. He was also criticized for charging ten cents to get between Harlem and 42nd Street in addition to six cents to use the horsecars to get to City Hall Park, which is more than the parallel Third Avenue Elevated, which charged six cents. These stations were all closed by 1906 by approval of the Railroad Commission.:73
Proposed extension to City HallEdit
In 1872, the New York City Rapid Transit Company was chartered, authorizing Vanderbilt to build and operate a two-track extension of the line from Grand Central to City Hall Park, connecting with the existing line between 48th Street and 59th Street.:104 The line would have run from Broadway's east side at City Hall Park east to Chatham or Centre Street, then to Park Street, Mott Street, the Bowery, Third Avenue, and Fourth Avenue to connect with the existing line between 48th Street and 59th Street. While Cornelius Vanderbilt had indicated his intent to continue the underground line to City Hall, there was speculation that he did not intend to build the section south of 42nd Street. The Superintendent Engineer of the project, Isaac Buckhout, said that he had been receiving proposals for the project and that all surveys for it had been completed by January 1873. The estimated cost of the project made by Buckout came out to be $9.1 million. William Henry Vanderbilt stated that the line would not be as dark as the Metropolitan Railway (now part of the London Underground), and that there would be stations every eight blocks, or every .5 miles (0.80 km). In January 1873, he expected the cost of the work to City Hall to be $8 to $10 million, and that the whole project would be completed by January 1, 1875. The line was expected to have 400,000 daily passengers, and trains would have traversed the line from City Hall to Grand Central in 12 minutes, and from there to the Harlem River in 10 minutes.
According to a prominent officer of the New York Central, a member of the Board of Directors, Commodore Vanderbilt had fully intended to extend the underground steam railroad to City Hall, and had plans drawn and ready to be executed. His son, William Vanderbilt, objected to the plan after returning from London, and having ridden on the Metropolitan Railway, believed that the public would not tolerate riding in a dark tunnel. Commodore Vanderbilt decided not to build the line due to public criticism for the grant. opposition to the project:104 from business people and homeowners in the Bowery and due to the Panic of 1873.
In April 1877, the New York City Board of Alderman passed a resolution requesting that Commissioner Campbell assess the feasibility of constructing an underground line from City Hall to the existing line by private enterprise. The Commissioner was strongly in support of such a plan, and predicted that such a line would have a daily ridership of 100,000, would make $1,800,000 annually and would cost $9 to $10 million to build–in his mind, a financial success. William Vanderbilt was criticized for not following through on the plans of his father to extend the line to City Hall.
In 1880, the New York Tunnel Railway was incorporated to construct a railroad from Washington Square Park under Wooster Street and University Street to 13th Street, and then under Fourth Avenue and 42nd Street to connect to the Fourth Avenue Improvement. On October 2, 1895, the Central Tunnel Company, the New-York and New-Jersey Tunnel Railroad Company, and the Terminal Underground Railroad Company of New York were consolidated into the Underground Railroad Company of the City of New York. Together, they planned to build a line running from City Hall Park to the Fourth Avenue Improvement. The line would have run north under Chambers Street and Reade Street, before going up Elm Street to Spring Street, Marion Street and Mulberry Streets, before continuing through blocks and Great Jones Street, Lafayette Place, Astor Place and Eighth Street, and then under Ninth Street to Fourth Avenue, before heading under 42nd Street to Grand Central Depot to connect with the Fourth Avenue Improvement. The line would have had three connecting branches.
Park Avenue ImprovementEdit
In 1888, the United States Department of War began work on the Harlem River to allow for unrestricted shipping activity between the Hudson River and the East River and through the new Harlem River Ship Canal at 225th Street. The New York Central was opposed to the project as the increase in river traffic would interfere with its rail line, which was only 8 feet (2.4 m) above the water. In 1890, the New York and Northern Railway, a competitor of the New York Central which operated freight traffic to the Bronx shore which relied upon barges to ship its freight, complained to the Department of War about delays to its traffic due to the New York Central's low bridge. To remedy the situation, the Central could have raised the bridge to 24 feet (7.3 m) above the water to satisfy the Department of War, allowing most vessels to cross under the bridge, for $300,000 or replaced it with a tunnel to satisfy the Harlem community for $3 million. The railroad opted to raise the bridge, which was the only four-track drawbridge in the country at the time, but due to political pressure, it had to raise the grade of its line north of 115th Street on a viaduct, raising the project's cost significantly. In 1892, a law was passed establishing the Board of Park Avenue Improvement, and under the terms of the law, New York City was to pay for half of the project, with the remainder paid for by the New York Central. The members of the board were appointed by the Mayor of New York City. The details of the plan, titled the Park Avenue Improvement, were given by the New York Central in April 1893, at which point they were almost completed.
The new bridge was to be 400 feet (120 m)-long and was built for about $500,000 by the King Bridge Company. The new bridge was to be 17 feet (5.2 m) higher than the old bridge, as mandated by the Federal Government, making it 24 feet (7.3 m) above the water. The Park Avenue Line's grade had to be raised to allow it to reach the higher bridge, and as a result, a new four-track steel viaduct was built between 132nd Street and 106th Street. Between 110th Street and 106th Street, the steel viaduct was to be placed atop the preexisting masonry retaining walls and fill. Between 115th Street and 130th Street, the viaduct was set to replace the open cut structure completed in 1875. Since the line was to be raised on a viaduct, the stone viaducts and the bridges crossing it could be removed. The 110th Street, 125th Street and Mott Haven stations were to be elevated as part of the project. The station at 110th Street was rebuilt in the stone viaduct, making it 11 feet (3.4 m) higher than it was previously. The railroad had threatened to eliminate the 125th Street stop after neighboring property owners threatened to sue and successfully delayed construction.
During the course of construction, trains were to run over a temporary wooden structure along with a temporary two-track wooden drawbridge. The cost of the entire project was to be $2,000,000. At the time, construction was expected to begin on September 1, 1893. The work was divided into four sections. The bridge's design was underway in 1894, and in February of that year, the project was expected to be completed in December 1895. Service continued to operate while the complex work proceeded through a procedure involving the installation of temporary wooden trestles, trusses, and the installation of columns.
On February 15, 1897, trains on the Harlem Division started running over the new drawbridge over the Harlem River and the elevated structure connecting to it.:25 The Department of War ordered that the bridge cannot be opened during peak hours, between 7 and 10 a.m. and 4 and 7 p.m. First a connection was made between the new tracks and the old tracks in between 115th Street and 116th Street. At 117th Street, the temporary tracks used the old viaduct, going under the new structure to 125th Street. Later on, the old and temporary work was removed. Two of the four tracks were not yet built between the bridge and 149th Street since the space was occupied by a temporary structure. The grade crossing at 138th Street was eliminated as part of the project. On October 15, 1897, a spacious new station in Harlem was opened at 125th Street, replacing a small station in the old Park Avenue open cut located between 125th Street and 126th Street. The new station was built atop the old open cut and directly under the new Park Avenue Viaduct. The station was 30 feet (9.1 m) higher than the old one. The platforms, which were built on the viaduct, were built to be 400 feet (120 m) long. Unlike the old station, which was a local stop, the new station was constructed with two island platforms to allow express trains to stop, with the local tracks curving outwards to make room for them. The station was designed by architect Morgan O'Brien, and consisted of three levels: the basement containing a section of the old cut not filled in, a waiting room at street level, and the elevated platforms. The original station platforms were discovered in the basement level in 1988 as the current station was set to be renovated.
On April 29, 1901, the New York Central was granted permission to abandon the 86th Street and the 72nd Street stations by the New York State Railroad Commissioners. The 86th Street station was last listed on the May 20, 1901 timetable and was left off the June 23, 1901 timetable. The New York Central applied to the New York State Board of Railroad Commissioners for permission to discontinue service at the 110th Street station on April 24, 1906. The Board granted the Central permission on May 9 to close the station on June 1. However, it closed on June 17.
As train traffic to Grand Central increased dramatically at the end of the 19th century, the operation of steam locomotives in the tunnel resulted in both an extremely unpleasant experience for riders and a dangerously low level of visibility for train engineers.:189 William J. Wilgus, the chief engineer of New York Central, had proposed electrifying the New York Central lines to Grand Central in 1899, using an electric third rail power system devised by Frank J. Sprague. Though Wilgus's plan was approved, it was not carried out due to a lack of funding.
On January 8, 1902, a southbound train overran signals in the smoky Park Avenue Tunnel and collided with another southbound train, killing 15 people and injuring more than 30 others. The crash directly resulted in the construction of the modern-day Grand Central Terminal.:194–7 A week after the crash, New York Central president William H. Newman announced that all of the railroad's suburban lines to Grand Central would be electrified, and the approach to the station would be put underground. The New York state legislature subsequently passed a law to ban all steam trains in Manhattan beginning on July 1, 1908. By December 1902, as part of an agreement with the city, New York Central agreed to put the approach to Grand Central Station from 46th to 59th Streets in an open cut under Park Avenue, and to upgrade the tracks to accommodate electric trains. Overpasses would be built across the open cut at most of the cross-streets.
Following the crash, plans to electrify the line and replace the then-overcrowded Grand Central Depot were announced. In March 1903, Wilgus presented a more detailed proposal to the New York Central board, describing a modern railroad terminal with separate levels for commuter and intercity railroads, among other things. Wilgus's plan was approved, and subsequently, Grand Central Depot was demolished in phases and replaced with the current Beaux Arts-style Grand Central Terminal. As part of the project, the rail yard and the approach from 59th Street were placed underground and electrified. Electric locomotives were placed in regular passenger service in January 1907.:194–7
The New York Central Railroad tested third-rail-powered electric trains in 1904, using a fleet of new MU Sprague-GE cars from the General Electric Company, and found that their speeds were adequate for service into Grand Central. Over the next few years, the New York Central and New Haven Railroads electrified their tracks, allowing trains to enter Grand Central Terminal upon its completion. The first electric train departed for the soon-to-be-demolished Grand Central Station, from the Harlem Division's Highbridge station in the Bronx, on September 30, 1906.:97 By late 1906, Harlem Division trains were also electrified, and its operations moved to the basement of Grand Central Palace. New Haven Division electric trains started running to Grand Central in October 1907.
With the elimination of the noise and pollution from steam locomotives, this once undesirable section of Park Avenue and the land freed by the burial of the rail yard became prime New York City real estate. The area became one of the city's most attractive residential areas as mansions and high-class apartments were constructed along Park Avenue.:9 The area around Park Avenue in the vicinity of Grand Central was developed into Terminal City. Stretching from 42nd to 51st Streets between Madison and Lexington Avenues, it came to include the Chrysler Building and other prestigious office buildings; luxury apartment houses along Park Avenue; and an array of high-end hotels that included the Marguery, Park Lane, and Waldorf Astoria. The idea to place the rail yard below Park Avenue and construct buildings above it was credited to Wilgus.
In 1929, New York Central installed bidirectional signaling along the Park Avenue Tunnel so that all four tracks could be used in either direction, thereby increasing capacity by 25% and allowing trains to operate at least 90 seconds apart. Semaphore signals composed of pivoted arms were replaced with tricolor signals resembling traffic lights. In 1956, the swing bridge over the Harlem River was replaced by a lift bridge.
Between 1988 and 1990, the Park Avenue Tunnel was rehabilitated. An amendment to the Metropolitan Transportation Authority (MTA)'s 1982–1986 Capital Program in 1983 provided $46 million in additional funding for the project. As part of the project, structural steel, aged wiring conduits, and the roadbed were replaced, the side walls and waterproofing were repaired and a new drainage system was installed. The contract for the project was awarded in December 1986 and construction on it began in mid-1987, at which point the project's cost reached $105 million. The project was completed in June 1992, ten months after its anticipated completion date of August 1991, resulting from issues with the project design. The tunnel roof's design was changed from being pre-cast to being cast-in-place after wood pilings were discovered in the tunnel, avoiding the need to spend an additional $20 to $30 million. In addition, the concrete ties for the tunnel were defective and were replaced by wood ties, and other costs were underestimated. In the end, the project cost $144 million.:117–119
The Park Avenue Viaduct was repaired by Metro-North Railroad between 1995 and 1998 for $120 million. The project replaced the existing deck with a concrete one, and repaired columns, retaining walls and girders. A low-level barrier was installed on either side of the viaduct to reduce noise from train wheels. At the same time, extensive repairs to the Park Avenue Tunnel Train Shed began.:120
In September 2007, Metro-North reached an agreement with the New York City Department of Transportation (NYCDOT) to install pedestrian traffic signals along Park Avenue between 46th Street and 56th Street. The two sides had feuded over the issue since 1982, when the line was controlled by Penn Central. In 1997, the NYCDOT commissioner stated that signals would be installed during an upcoming phase of reconstruction in the Grand Central area. The $35 million project, whose cost was split between Metro-North and the city, was approved by the MTA Board later that month. It called for the installation of 12 pedestrian signals and 8 traffic signals at the eleven intersections and the renovation of the sidewalks and streets around Grand Central to prevent rainwater from seeping into the tunnel. Car traffic in this area had been controlled by traffic lights on a pole at each intersection in the middle of the median, instead of the usual four from each direction, resulting in a relatively high rate of pedestrian injuries. Additional traffic lights and pedestrian signals had not been added because this area of Park Avenue was located directly atop the roof of the Park Avenue Tunnel, with the street being 8 inches (20 cm) above the roof in some locations. Because the roof was 18 to 24 inches (46 to 61 cm) thick, there was not enough room to provide a foundation for the traffic poles without puncturing the structure. Due to the high cost of making these upgrades, and the lack of cooperation between the New York City Department of Transportation and Metro-North, which had opposed any solution that would modify the tunnel roof. The project had been estimated to cost $200,000 per intersection in 1994. As part of the new agreement, Metro-North designed a way to anchor the traffic signals in the deck and tunnel roof.
In 2013, the MTA completed a comprehensive assessment of the condition of the Train Shed as part of the 2010–2014 Capital Program. Following the study, plans were developed to repair the structure block-by-block. In the MTA's 2015–2019 Capital Program $180 million was provided to replace the structure under Park Avenue between 48th Street and 49th Street in addition to other locations. However, the July 2017 amendment to the program reduced the project to $67 million, moving the first stage of construction to the next capital program. The program also included $1 million in funding to study improvements to improve fire safety in the Park Avenue Tunnel, including the installation of improved emergency lighting and wayfinding signage directing to emergency exits. The cost for this project later increased to $5 million.
On May 17, 2016, a fire started under the Park Avenue Viaduct at 118th Street when a worker at nursery that had been leasing space under the viaduct from the city spilled fuel on a generator. Temporary repairs allowed for the resumption of service. In July, the MTA Board approved the allocation of $3.3 million to pay for the construction of temporary supports for the structure, which would eliminate speed restrictions imposed for diesel locomotives. That same month, the MTA moved to sue the city over the fire. The temporary repairs were completed in September, and permanent repairs were completed in November. The permanent repairs, which replaced a support column, cost $6 million. After the fire, Metro-North assessed the condition of the entire viaduct and identified sections that critically needed to be replaced. In May 2019, Metro-North announced, as part of its Way Ahead plan to improve service, that it would request funding to replace the Park Avenue Viaduct and repair the Park Avenue Tunnel as part of the MTA's upcoming 2020–2024 Capital Program.
In September 2019, the Capital Program was released by the MTA and approved by the MTA Board; it includes $159.6 million for improvements in the tunnel, $386.9 million in funding to replace the viaduct, and $348.8 million to repair the Grand Central Terminal trainshed. The viaduct and trainshed projects will be completed in multiple stages and will be completed in future capital programs. The first stage of the viaduct project consists of inspections, design work, and the replacement of the most critical portions of the viaduct. During the first part of the trainshed project, the first section of trainshed will be replaced and design work will be completed for the next part. The trainshed repairs will address the deterioration of the trainshed's roof and its support due to the intrusion of water and salt from Park Avenue. The Park Avenue Tunnel project will construct four new emergency exits in two locations.:109, 116, 121, 209, 210
Along the viaduct, there is one former station at 110th Street, and along the tunnel are three former stations, located at 59th Street, 72nd Street, and 86th Street, each of which had side platforms on the two outer tracks. These are now used for storage and emergency exits. None of the stations' platforms are more than 172 feet (52 m) long, making them too short for contemporary trains to use. While the 59th Street and 72nd Street stations had typical side platforms located on the outside of all four tracks (i.e. trains on the outer tracks opened their doors on the right), the 86th Street station had two platforms located in between the outside tracks and the center pair of tracks, creating side platforms that resembled walled-off island platforms. This is similar to the layout at 14th Street–Sixth Avenue, except the platforms are walled off from the center tracks, so that trains on the outer tracks opened their doors on the left, and trains on the inner tracks bypassed the station.
|Zone||Milepost (km)||Station||Location||Date opened||Date closed||Connections|
|1||0.0 mi (0 km)||Grand Central Terminal||New York||October 6, 1871||New York City Subway: 4, 5, 6, <6>, 7, <7>, and S (at Grand Central–42nd Street)|
New York City Bus: M42, M101, M102, M103, SIM4C, SIM6, SIM11, SIM22, SIM26
MTA Bus: BxM1
|72nd Street||June 23, 1901|
|2.2 mi (3.5 km)||86th Street||May 15, 1876||June 23, 1901|
|3.4 mi (5.5 km)||110th Street||May 15, 1876||June 17, 1906|
|4.2 mi (6.8 km)||Harlem–125th Street||October 25, 1897||New York City Subway: 4, 5, 6, and <6> (at 125th Street)|
New York City Bus: Bx15, M35, M60 SBS, M98, M100, M101
|2||5.0 mi (8.0 km)||138th Street||The Bronx||c. 1858||July 2, 1972|
- Parkinson, Tom; Fisher, Ian (1996). Rail Transit Capacity. Transportation Research Board. p. 98. ISBN 9780309057189.
- Green, Richard E. (2009). Metro-North Railroad Track Map (Map).
- "Metro-North Railroad Track Charts, Maintenance Program, Interlocking Diagrams, & Yard Diagrams" (PDF). Metro-North Railroad. 2015. p. 84. Retrieved May 12, 2019.
- Robins, Anthony (2013). Grand Central Terminal: 100 Years of a New York Landmark. Abrams. ISBN 978-1-61312-387-4. Retrieved December 6, 2018.
- "MTA Capital Program 2020–2024". mta.info. Metropolitan Transportation Authority. September 16, 2019. Retrieved October 3, 2019.
- "Grand Central Terminal Interior" (PDF). Landmarks Preservation Commission. September 23, 1980.
- Hyatt, Elijah Clarence (1898). History of the New York & Harlem Railroad. OCLC 932095608. Retrieved June 21, 2017.
- Grogan, Louis V. (1989). The Coming of the New York and Harlem Railroad. Louis V. Grogan. ISBN 0962120650.
- The Financial Limitations Of Our Fore-Fathers. Railroad Branch of the Young Men's Christian Association of the City of New York. 1901. pp. 350–352. OCLC 754563648.
- Meyers, Stephen L. (2005). Manhattan's Lost Streetcars. Arcadia Publishing. ISBN 9780738538846.
- "Park Avenue Historic District Designation Report" (PDF). nyc.gov. New York City Landmarks Preservation Commission. April 29, 2014. Retrieved December 31, 2018.
- Kelly, Frank Bergen (1909). Historical Guide to the City of New York. New York: F.A. Stokes Co. p. 117.
- "New York City and Vicinity Map 1860". brooklynrail.net. Retrieved June 20, 2017.
- Murray Hill Historic District Extensions Designation Report (PDF). New York City Landmarks Preservation Commission. March 30, 2004. pp. 4, 8, 13.
- "The Grand Central Railroad Depot, Harlem Railroad". The New York Times. October 1, 1871. p. 6. ISSN 0362-4331. Retrieved July 4, 2011.
- "The Railroad Trap.; Another Day's Scenes at the Grand Central Depot". The New York Times. November 18, 1871. Retrieved December 4, 2018.
- "Railroad Abuses.; Official Investigation into the Grand Central Depot Nuisance. Scenes and Incidents at the Crossings Yesterday.Search for the Missing Dead Only One Out of the Seven Said to be Killed Yet Found The Coroners and the PoliceUtterly in the Dark. The Dangers that Centre Around the New Vanderbilt Depot What the Officials Say Minor Inconveniences". The New York Times. November 17, 1871. ISSN 0362-4331. Retrieved October 3, 2019.
- Reports of Decisions of the Public Service Commission, First District, of the State of New York Volume VIII January 1, 1917 to December 31, 1917. New York State Public Service Commission. 1918.
- "The Fourth-Ave. Improvement. Vigorous Prosecution of the Work". New-York Tribune. May 24, 1873. Retrieved December 31, 2018 – via newspapers.com.
- "The Fourth Avenue Improvement". New York Daily Herald. January 11, 1873. Retrieved December 31, 2018 – via newspapers.com.
- Eldredge, Niles & Horenstein, Sidney (2014). Concrete Jungle: New York City and Our Last Best Hope for a Sustainable Future. Berkeley, California: University of California Press. p. 121. ISBN 978-0-520-27015-2.
- "The Vanderbilt Tunnel: Starting the Trains for the First Trip". The Buffalo Commercial. June 22, 1875. Retrieved December 31, 2018 – via newspapers.com.
- "Rapid Transit At Last. Work begun on the New Road–The Passage to be Made Between the City Hall and Harlem River in Twenty-two Minutes–One Thousand Men to be Put to Work". New York Daily Herald. January 15, 1873. Retrieved December 31, 2018 – via newspapers.com.
- "The State Capital; Rapid Transit of Railroad Bills in the Assembly". New York Herald. April 24, 1872. p. 13. Retrieved December 6, 2018 – via newspapers.com.
- Fitch, James Marston; Waite, Diana S. (1974). Grand Central Terminal and Rockefeller Center: A Historic-critical Estimate of Their Significance. Albany, New York: The Division.
- "Fourth Avenue Improvements. The Work and When it Will Be Finished–Two New Tunnels Through the Rock in Yorkville". New York Daily Herald. January 5, 1873. Retrieved December 31, 2018 – via newspapers.com.
- "The New Railway Entrance Into New York". Sterling Gazette. June 30, 1875. Retrieved December 31, 2018 – via newspapers.com.
- "Grand Central Terminal Is 100 Years Old". The Bulletin. Electric Railroaders' Association. 56 (3): 5. March 2013 – via Issu.
- "Rapid Transit and Fourth-avenue Improvement". The New York Times. October 30, 1872. ISSN 0362-4331. Retrieved December 31, 2018 – via newspapers.com.
- "The Fourth-Avenue Improvement". The New York Times. January 15, 1873. ISSN 0362-4331. Retrieved December 31, 2018 – via newspapers.com.
- "Proposals: Board of Engineers of The Fourth Avenue Improvement". New York Daily Herald. January 5, 1873. Retrieved December 31, 2018 – via newspapers.com.
- "Railroad Engineering In Harlem.; Progress of the Work of Elevating the Central's Tracks in Park Avenue" (PDF). The New York Times. August 23, 1894. ISSN 0362-4331. Retrieved June 21, 2017.
- Roberts, Sam (January 22, 2013). Grand Central: How a Train Station Transformed America. Grand Central Publishing. ISBN 9781455525959.
- "The Fourth Avenue Improvement". New York Daily Herald. June 6, 1874. Retrieved December 31, 2018 – via newspapers.com.
- "Mayor Havemeyer And The Fourth Avenue Improvement". The Rutland Daily Globe. June 8, 1874. Retrieved December 31, 2018 – via newspapers.com.
- Baer, Christopher T. (February 2006). "PRR Chronology: A General Chronology of the Pennsylvania Railroad Company Predecessors and Successors And Its HistoricalContext 1875 February 2006 Edition" (PDF). prrths.com. The Pennsylvania Railroad Technical & Historical Society. Retrieved December 31, 2018.
- "Local Rapid Transit in the Metropolis–Opening of Through Travel on New York's New Underground Railway–Local Travel to Begin in September–Cost of the Work–Description of the Road from Official Sources–Grade–Bridges–Tunnels–The Viaduct". The Pittsburgh Daily Commercial. July 17, 1875. Retrieved December 31, 2018 – via newspapers.com.
- "The Sunken Tracks to Harlem. Trains Running Over The Entire Fourth Avenue Improvement–Increased Facilities of Travel To Be Provided". New-York Tribune. June 22, 1875. Retrieved December 31, 2018 – via newspapers.com.
- "The Fourth Avenue Improvement". The New York Times. June 21, 1875. ISSN 0362-4331. Retrieved December 31, 2018 – via newspapers.com.
- "Who Is Responsible!". The New York Times. January 7, 1876. ISSN 0362-4331. Retrieved December 31, 2018 – via newspapers.com.
- "Partial Rapid Transit,: From The Grand Central Depot. Arrangements For Quick Trains On The Harlem Road Trains To Run Next Monday Fares, Time, Rates of Commutation" (PDF). The New York Times. May 12, 1876. ISSN 0362-4331. Retrieved June 21, 2017.
- "Rapid Transit To And From Harlem" (PDF). The New York Times. April 13, 1876. ISSN 0362-4331. Retrieved June 21, 2017.
- "The Underground Vanderbilt Road". The New York Sun. May 14, 1876. Retrieved December 31, 2018 – via newspapers.com.
- "Mr. Campbell's Rapid Transit Plan". The New York Times. April 29, 1877. ISSN 0362-4331. Retrieved December 31, 2018 – via newspapers.com.
- Report of the Board of Rapid Transit Railroad Commissioners Of The City of New York 1900-1901. New York City Board of Rapid Transit Railroad Commissioners. 1902.
- "Rapid Transit. The Value of the Proposed Lateral and "Loop Lines" of Railway Explained and Illustrated". New York Daily Herald. March 1, 1875. Retrieved January 1, 2019 – via newspapers.com.
- Walker, James Blaine (1918). Fifty Years of Rapid Transit, 1864-1917. Law Printing Company. pp. 98–100. ISBN 0405024800.
- "Rapid Transit. The Work from the City Hall to Forty-second Street To Be Finished in Two and a Half Years at the Latest–Views of Mr. W. H. Vanderbilt–What He Thinks of the Attempt of the City or State to Build a Road". New York Daily Herald. January 17, 1873. Retrieved December 31, 2018 – via newspapers.com.
- "The New York Central and Harlem Road and Its Entrance to New York". The Record and Guide. 40 (1011): 1009. July 30, 1887.
- "Vanderbilt's Part In Tunnel Company. Cornelius Represents Only His Own Interests. May Be Active In the Work. His Presence in the Directory Not Indicative of an Alliance with the New York Central". The New York Times. February 21, 1900. ISSN 0362-4331. Retrieved January 1, 2019 – via newspapers.com.
- "Fruits of Rapid Transit". The New York Times. April 1, 1879. ISSN 0362-4331. Retrieved December 31, 2018 – via newspapers.com.
- "Another Underground Railroad". Poughkeepsie Eagle-News. June 30, 1880. Retrieved December 31, 2018 – via newspapers.com.
- "Tunnel Consolidation: Three Underground Railway Companies Form a Single Corporation". The New York Times. October 3, 1895. ISSN 0362-4331. Retrieved December 31, 2018 – via newspapers.com.
- Gray, Christopher (February 19, 1995). "Streetscapes/The Park Avenue Railroad Viaduct; A $120 Million Renovation for an 1897 Behemoth". The New York Times. ISSN 0362-4331. Retrieved January 1, 2019.
- Gray, Christopher (September 18, 1988). "Streetscapes: The 125th Street Station; Metro-North Plans New Makeup, Not Plastic Surgery, for a Beauty". The New York Times. ISSN 0362-4331. Retrieved December 31, 2018.
- "Central Won't Pay Up. Trouble Between The Railroad and the Park Avenue Commissioners Over Laborer's Bills". New York Journal and Advertiser. August 14, 1897. Retrieved December 31, 2018.
- "The Park Avenue Improvement In New York City". Scientific American. 70 (17). April 28, 1894.
- "To Raise The Central's Tracks.; The Park Avenue Improvement and the New Harlem Drawbridge" (PDF). The New York Times. April 24, 1893. ISSN 0362-4331. Retrieved June 21, 2017.
- Second Avenue Subway in the Borough of Manhattan, New York County, New York: Supplemental Draft Environmental Impact Statement. Metropolitan Transportation Authority. March 2003. pp. G1–6, G1–7. OCLC 52034794.
- "The New Railway Entrance To Manhattan Island". Harper's Weekly. Harper's Magazine Company. 39 (2002): 414. May 4, 1895.
- "Improvements At The Harlem River Bridge". Scientific American. 67 (27). December 31, 1892.
- "A Great Drawbridge". The New York Times. February 14, 1894. ISSN 0362-4331. Retrieved December 31, 2018 – via newspapers.com.
- "Fitch Will Issue Bonds. Work on the Fourth Avenue Improvement to Be Resumed. The Comptroller Acting on Corporation Counsel's Advice". The Evening World. January 16, 1894. Retrieved December 31, 2018 – via newspapers.com.
- "News of the Railroads; New York Central Trains Running Regularly over the New Viaduct and Bridge". The New York Times. February 16, 1897. ISSN 0362-4331. Retrieved January 1, 2019.
- "A New Railroad Station.; To be Opened Soon at 125th Street by the Central and Harlem River Roads" (PDF). The New York Times. October 8, 1897. ISSN 0362-4331. Retrieved June 21, 2017.
- "Railroad Station For Harlem: To be Built at Park Avenue near One Hundred and Twenty-fifth Street" (PDF). The New York Times. April 6, 1896. ISSN 0362-4331. Retrieved December 31, 2018.
- Health and Pleasure on "America's Greatest Railroad.": Descriptive of Summer Resorts and Excursion Routes, Embracing More Than One Thousand Tours by the New York Central & Hudson River Railroad. New York Central and Hudson River Railroad Company. 1895. p. 75.
- "Railroad Projects Heard: Harlem Road to Abandon Seventy-second and Eighty-sixth Street Stations". The New York Sun. April 30, 1901. Retrieved December 27, 2018.
- The Official Guide of the Railways and Steam Navigation Lines of the United States, Porto Rico, Canada, Mexico and Cuba. National Railway Publication Company. 1900. p. 200.
- The Official Guide of the Railways and Steam Navigation Lines of the United States, Porto Rico, Canada, Mexico and Cuba. National Railway Publication Company. 1901. p. 190.
- Twenty-Fourth Annual Report of the Board of Railroad Commissioners of the State of New York 1906 Volume 1 Transmitted to the Legislature January 14, 1907. New York State Board of Railroad Commissioners. 1907. p. 116.
- Coal and Coal Trade Journal. Coal Publishing Corporation. 1906. p. 381. OCLC 9950993.
- "New York Central Can Close Station". The Evening World. New York. May 18, 1906. Retrieved December 27, 2018 – via newspapers.com.
- "N. Y. Central Closes 110th Street Station". Buffalo Evening News. June 13, 1906. Retrieved December 27, 2018 – via newspapers.com.
- Cudahy, Brian J. (2003). A Century of Subways: Celebrating 100 Years of New York's Underground Railways. New York: Fordham University Press. ISBN 0-8232-2292-6.
- Sprague, J. L.; Cunningham, J. J. (2013). "A Frank Sprague Triumph: The Electrification of Grand Central Terminal [History]". IEEE Power and Energy Magazine. Institute of Electrical and Electronics Engineers (IEEE). 11 (1): 58–76. doi:10.1109/mpe.2012.2222293. ISSN 1540-7977.
- "Electric Power And Loop, Central's Plan; Tunnel Improvements Which May Cost $10,000,000 Adopted Suburban Service To Be Dependent Upon Electricity Alone, Trains to Run Into an Underground Station -- Issue of Stock to Supply Funds". The New York Times. January 16, 1902. ISSN 0362-4331. Retrieved December 10, 2018.
- "Park Avenue Tunnel Crash, 1902". pbs.org. PBS. January 8, 1902. Retrieved December 19, 2018.
- "Fifteen Killed In Rear End Collision". The New York Times. January 9, 1902. ISSN 0362-4331. Retrieved December 10, 2018.
- "Fifteen Killed, Thirty-Six Hurt". New-York Tribune. January 9, 1902. p. 1. Retrieved December 10, 2018 – via newspapers.com.
- "Electric Power and Loop, Central's Plan; Tunnel Improvements Which May Cost $10,000,000 Adopted Suburban Service To Be Dependent Upon Electricity Alone, Trains to Run Into an Underground Station -- Issue of Stock to Supply Funds". The New York Times. January 16, 1902. ISSN 0362-4331. Retrieved December 10, 2018.
- "New York Central To Accept City's Plan". The New York Times. December 27, 1902. ISSN 0362-4331. Retrieved December 10, 2018.
- "Store and Hotel In New Grand Central". The New York Times. February 4, 1903. ISSN 0362-4331. Retrieved December 10, 2018.
- "Electric Locomotive Perfect, Tests Prove". The New York Times. November 13, 1904. ISSN 0362-4331. Retrieved December 11, 2018.
- Schlichting, Kurt C. (2001). Grand Central Terminal: Railroads, Architecture and Engineering in New York. Baltimore: Johns Hopkins University Press. ISBN 0-8018-6510-7.
- "Electric Trains Soon". New-York Tribune. November 24, 1906. p. 12. Retrieved December 13, 2018 – via newspapers.com.
- "Electrical Service Ready To Stamford". The New York Times. October 5, 1907. ISSN 0362-4331. Retrieved December 13, 2018.
- Gray, Christopher (August 19, 2010). "Covering Its Tracks Paid Off Handsomely". The New York Times. ISSN 0362-4331. Retrieved December 10, 2018.
- Gray, Christopher (October 11, 1992). "Building Atop Railroad Yards; A 1902 Precedent for Trump's Plan". The New York Times. ISSN 0362-4331. Retrieved August 22, 2009.
- "Central's Tracks Here To Be Two-Way; Railroad to Add to Capacity by 25% by Making All Four Park Avenue Lines Reversible. To Alter Signal System Improvement Permitting Minute and-a-Half Headway Caused by Gain in Suburban Traffic". The New York Times. November 23, 1929. ISSN 0362-4331. Retrieved December 15, 2018.
- Review of the Metropolitan Transportation Authority Capital Program. Office of the Metropolitan Transportation Authority Inspector General. 1991. OCLC 855510496.
- "September 10, 2003/Calendar No.22" (PDF). citylaw.org. New York City Planning Commission. September 10, 2003. p. 8. Retrieved January 1, 2019.
- Stamler, Bernard (November 16, 1997). "Neighborhood Report: East Side; The Mystery of Missing Park Ave. Lights". The New York Times. ISSN 0362-4331. Retrieved October 3, 2019.
- Neuman, William (September 22, 2007). "It's a Deal: Help for Park Ave. Pedestrians". The New York Times. ISSN 0362-4331. Retrieved October 3, 2019.
- Upham, Ben (December 17, 2000). "Neighborhood Report: Midtown; For Jaywalkers Who Dare, A Scary Stretch of Park Avenue". The New York Times. ISSN 0362-4331. Retrieved October 3, 2019.
- Lambert, Bruce (September 11, 1994). "Neighborhood Report: Midtown ; Pushing to Make Park Avenue Safer". The New York Times. ISSN 0362-4331. Retrieved October 3, 2019.
- Pollak, Michael (September 24, 1996). "Unwelcome and Uncounted". The New York Times. ISSN 0362-4331. Retrieved October 3, 2019.
- "2015–2019 MTA Capital Program" (PDF). mta.info. Metropolitan Transportation Authority. September 24, 2014. pp. 100–101. Retrieved October 3, 2019.
- "2015–2019 MTA Capital Program Amendment No. 2" (PDF). mta.info. Metropolitan Transportation Authority. May 2017. pp. 67, 70. Retrieved October 3, 2019.
- "M7020102 Park Av Tunnel Fire&Life Safety Impvmts". mta.info. Metropolitan Transportation Authority. Retrieved October 3, 2019.
- "Park Avenue Viaduct Update: Permanent Repairs Completed". mta.info. Metropolitan Transportation Authority. 2016. Retrieved October 3, 2019.
- Coyne, Matt (July 25, 2016). "MTA Approves Park Avenue Fixes". Lohud. Retrieved October 3, 2019.
- Coyne, Matt (July 28, 2016). "MTA moves to sue NYC over May 17 viaduct fire". Lohud. Retrieved October 3, 2019.
- Coyne, Matt (September 9, 2016). "Metro-North: Repairs to Park Ave viaduct end AM delays". Lohud. Retrieved October 3, 2019.
- Coyne, Matt (December 12, 2016). "Metro-North completes permanent Park Avenue viaduct repairs". Lohud. Retrieved October 3, 2019.
- "Way Ahead" (PDF). mta.info. Metropolitan Transportation Authority. May 2019. Retrieved October 3, 2019.
- Brennan, Joseph. ""The Underground Railway, New York City" 1875". Columbia University. Archived from the original on May 4, 2009. Retrieved October 9, 2018.
- "New York Central And Hudson River Railroad Harlem Division Time Table No. 3 For Employes Only Taking Effect At 12.01 A.M. Sunday, June 18, 1905" (PDF). canadasouthern.com. June 18, 1905. Retrieved June 12, 2018.
|Wikimedia Commons has media related to Park Avenue Railroad Tunnel and Viaduct.|
- Wilgus, William J. (1908). "The Electrification of the Suburban Zone of the New York Central and Hudson River Railroad in the Vicinity of New York City". Transactions of the American Society of Civil Engineers. 61. Paper No. 1079