Open main menu

Northwest Parkway

The Northwest Parkway is a 9-mile (14 km) road running from the intersection of I-25 and E-470 to US 36. Both termini are in Broomfield, Colorado, northwest of Denver. In combination with E-470 (47 miles) and SH 470 (27 miles), the Northwest Parkway forms a partial beltway of approximately 83 miles (134 km) around the Denver-Aurora Metropolitan Area. Some 18 miles (29 km) lie between the west end of the Northwest Parkway and the northwest end of SH 470, the opposite end of the beltway.[1]

Northwest Parkway
Map of north central Colorado with Northwest Parkway highlighted in red
Route information
Length9.052 mi (14.568 km)
Major junctions
West end US 36 in Broomfield
East end I-25 / E-470 in Broomfield
CountiesBroomfield, Boulder
Highway system
Colorado State Highways
Interchange of the Northwest Parkway, Interstate 25, and E-470

The Northwest Parkway was funded entirely with private money and charges a $3.80 toll. Tolls may be paid using highway-speed electronic tolling.

Route descriptionEdit

Northwest Parkway begins as a continuation of E-470 westward. Following a stack interchange with Interstate 25,[2] the parkway crosses Huron Street in suburban Broomfield, surrounded by fields. After intersecting Sheridan Parkway the route passes a small pond, followed by an underpass with Lowell Blvd. Near Dillon Road the parkway interchanges with U.S. Highway 287 in Lafayette before re-entering Broomfield near the end of the toll portion at 96th Street.[2] The parkway continues untolled for one last mile (1.6 km) before terminating at an interchange with U.S. Route 36.


Tolls on Northwest Parkway are charged based on Barrier toll system. It costs 2 axle vehicles $3.80 for the barrier on the mainline plaza and $1.25 for the ramp gantries [3]. ExpressToll and Go-Pass users do not pay processing fees, or late fees or any other fees in addition to the toll amount [4].


The Northwest Parkway opened to the public in November 2003. In November 2005, a new intersection opened at Sheridan Boulevard in northern Broomfield. In August 2001, the cities of Westminster and Arvada put into motion the completion of an extension of the Northwest Parkway, sometimes termed W-470, to connect to SH 470, I-70 and US 6 in Golden. The city of Golden struck down the proposal, but in a compromise with the Colorado Department of Transportation, an environmental impact study is being done. Most likely, Indiana Street and SH 93 would be used to complete the beltway.

Lease to foreign consortiumEdit

In 2007, the board of directors of the Northwest Parkway agreed to lease the operations of the highway to a consortium for 99 years. The two companies of the consortium are Brisa - Auto-estradas de Portugal and Companhia de Concessões Rodoviárias. According to the Boulder Daily Camera, this was the fourth time in two years that operations of an existing toll road in the USA had been turned over to a private company under a long-term lease.[5]

The Northwest Parkway had been consistently generating less income than envisioned when it was funded by three local governments — Broomfield, Lafayette, and Weld County. The parkway was built with $416.4 million in bonds, to be paid back with toll revenue over 35 years. Due to the road's under-utilization, the bond debt was downgraded in 2006. Utilization in 2007 was 12,000 cars per day, well below the 18,500 expected by 2004, one year after opening.[6]

Exit listEdit

City and County of Broomfield46.398–
47    I-25 / E-470 east – Denver, Fort Collins, Denver International AirportEast end of Northwest Parkway; continues east as E-470. I-25 exit 228.
48.07077.36148Sheridan Parkway
49.28079.308Toll plaza
BoulderLafayette52.36084.26552  US 287 / Dillon Road – Lafayette, Broomfield
City and County of Broomfield54.45087.62996th Street north / Via Varra south – LouisvilleAt-grade intersection; west end of tollway portion
55.4589.24  US 36 (Denver-Boulder Turnpike)Interchange; west end of Northwest Parkway; road continues as Interlocken Loop
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

See alsoEdit


  1. ^ Overview of Northwest Parkway
  2. ^ a b "Bing Maps". Retrieved 2010-06-01.
  3. ^ Northwest Parkway tolls
  4. ^ Northwest Parkway tolls
  5. ^ Wallace, Alicia (2007-12-24). "Business Briefs". Boulder Daily Camera. Archived from the original on 2008-01-18. Retrieved 2008-02-17.
  6. ^ Avery, Greg (2007-03-05). "Road to riches: Private company may purchase Northwest Parkway". Boulder Daily Camera. Retrieved 2008-02-17.[dead link]
  7. ^ Colorado Department of Transportation, Highway Data Archived 2007-10-08 at the Wayback Machine, accessed January 2008: note that not every interval between mileposts is exactly a mile, explaining why more exits than expected are at the exact milepost

External linksEdit