This is an archive of previous "Did you know?" items on the U.S. Roads Portal. Items are listed by the first month that they were displayed. To nominate an interesting fact for next month, please visit Portal:U.S. Roads/Did you know/Recommend.

2006 edit

February edit

March edit

April edit

 
Interstate H-1 eastbound previous to the Waikiki exits

May edit

 

2007 edit

February edit

August edit

 
I-15 southbound at milepost 17.8—afternoon sun in a bright red rock cut

September edit

 
A portion of Interstate 580 following the collapse

October edit

 
Luzerne County, Pennsylvania highlighted in red

November edit

 
Interstate 190 northbound at exit 18A (New York State Route 324) on Grand Island

2008 edit

February edit

 
Arroyo Seco Parkway looking south from Marmion Way

April 1 (April Fool's Day) edit

 
I-75 shield

April edit

 
Seney Stretch along M-28

May edit

 
Old and new route numbers at the intersection with US 191 in Monticello

June edit

 
Hite Crossing Bridge, Glen Canyon National Recreation Area

August edit

 
Map of U.S. Routes in Washington

September edit

 
I-15 at the Cedar Pocket

October edit

 
Map of Eisenhower Tunnel in Colorado

November edit

 
Interstate 90 in Wallace, Idaho

December edit

 
Julia Butler Hansen Bridge to Puget Island, Washington

2009 edit

January edit

February edit

 
Aerial map and diagram of the Newhall Pass Interchange
  • ... that Washington State Route 531's bridge over Cougar Creek had a collapsed culvert that was discovered and fixed during October 2008?
  • ... the routing of U.S. Route 191 has changed so many times that Yellowstone National Park is the only place that has been continuously served by the highway?
  • ... that the Robert Moses State Parkway was originally one continuous road; however, due to low usage, a portion of the parkway near Niagara Falls was removed, separating the parkway into two sections?
  • ... that the Newhall Pass interchange (pictured) has collapsed from earthquakes twice and burned from trucks colliding in a tunnel once?

March edit

April 1 (April Fool's Day) edit

 
I-75 shield

April edit

May edit

June edit

July edit

 
The Dewey Bridge, constructed in 1916

August edit

 
SR 508 eastbound as Main Avenue in Morton near the SR 7 intersection

September edit

 
Drawbridge at Tilghman Island, Maryland

October edit

 
Southbound New Jersey Route 55 approaching the exit for Deptford Center Road, exit 58

November edit

 
Looking westbound along the Vestal Parkway (NY 434) in Vestal

December edit

 
Maryland Route 231 (Prince Frederick Road) at the intersection with Maryland Route 5 Business in the heart of downtown Hughesville

2010 edit

January edit

February edit

 
Interstate 78 across the Watchung Reservation in New Jersey

March edit

 
Hand-painted centerline on state highway M-15 in Marquette County, Michigan in 1917

April 1 (April Fool's Day) edit

 
The route, the route, the route is on fire

April edit

 
Alabama route 10 and 141 signs as posted in Easthampton, Massachusetts

May edit

 
Seney Stretch along M-28

June edit

 
Approaching Donner Pass from the east on Lincoln Highway / old US 40, April 2007

July edit

 
Portage Lake Lift Bridge, at night, connecting the cities of Hancock and Houghton, Michigan

August edit

 
Road sign for Zzyzx Road in California

September edit

 
Looking east from the top of the Boji Tower showing the corner of Michigan and Grand avenues, part of the Capitol Loop

October edit

 
Lava from Puʻu ʻŌʻō flows through subsurface lava tubes until it meets the ocean, creating the steam plumes seen in the distance from Chain of Craters Road
  • ... that the interchange between Maryland Route 90 and U.S. Route 113 sat unused for 24 years until US 113 was relocated as a four-lane divided highway in 2000?

November edit

 

December edit

 

2011 edit

January edit

 
Tumbleweed Snowman

February edit

 
Disambiguation sign posted in advance of the MD 68 interchange on westbound I-70 near Clear Spring

March edit

 
Westbound on the Benedict Bridge over the Patuxent River looking toward Benedict

April 1 (April Fool's Day) edit

 
So many lights but no clocks
  • ... that Nevada State Route 604 (pictured) is one of the most famous highways in the world?
  • ... that because of some torpedos, cars were once stranded in a mousetrap?
  • ... that trying to drive the length of Maryland Route 797 sends drivers in circles?
  • ... that Interstate 4 crosses some of the coldest, most snow covered terrain in North America?
  • ... that people who have driven Utah State Route 299 end to end several times are really crappy drivers?
  • ... that 99 percent of people who claim to have been to Beatosu, Ohio are lying?

April edit

 
Plants washed onto the road at the Post Office, Pago Pago, American Samoa

May edit

 
Interstate 99 northbound in Blair Township

June edit

 
The SS Drummond Islander IV crossing the De Tour Passage

July edit

 
Westernmost end of the Fenway near Brookline Avenue

August edit

 
The Cave Rock Tunnel in winter

September edit

 
Virginia Street Bridge in downtown Reno, Nevada

October edit

 
The Cornish–Windsor Covered Bridge

November edit

 

December edit

 

2012 edit

January edit

 

February edit

 

March edit

 

April 1 (April Fool's Day) edit

 

April edit

 
Launch of Discovery on February 24, 2011

May edit

 
Motorcycles on the International Selkirk Loop, Colville National Forest, northeast Washington

June edit

 
Point Iroquois Lighthouse boardwalk along the Whitefish Bay National Forest Scenic Byway

July edit

 
US 50 stretching across the Nevada desert

August edit

 
SR 55 southbound at I-405 interchange in Costa Mesa

September edit

 
The Davison (M-8)

October edit

 
Route 17 at the Linwood Avenue East exit

November edit

 
Night photograph of the Mackinac Bridge

December edit

 
The Prospect Highway at one of the scenic overlooks along the mountainside

2013 edit

January edit

 
Gateway I-94 bridge over US 24

February edit

 
Signage denoting the State Senator Norman J. Levy Memorial Parkway designation just south of exit M7E on the northbound Meadowbrook

March edit

 
SR 162 crosses the Puyallup River northwest of Orting on the McMillin Bridge opened in 1934

April 1 (April Fool's Day) edit

 
I-95 shield

April edit

 
The original Sawgrass Expressway road signs

May edit

 
Seward Highway looking southbound along the Turnagain arm stretch

June edit

 
Portage Lake Lift Bridge

July edit

 
Anton Anderson Memorial Tunnel

August edit

 
View north to the Terwilliger curves from Terwilliger Boulevard

September edit

October edit

 
State Route 102 within Acadia National Park in Maine

November edit

December edit

2014 edit

January edit

 
CA 14U along Sierra Highway in Santa Clarita

February edit

 
Legacy Parkway approaching 500 South

March edit

 
A rural segment of I-37 between Corpus Christi and San Antonio

April edit

 
Brick-paved section of Lincoln Highway in West Omaha near Elkhorn

May edit

 
I-495 near the I-678 exit

June edit

 
A drawing entitled "the escape of Stonewall Jackson's Army down the valley pike at Strausburg [sic], Va." U.S. Library of Congress Collection

July edit

 
I-182 in Richland

August edit

September edit

 
View of Newburgh Bay and Pollepel Island from highway, 2006

October edit

November edit

December edit

2015 edit

January edit

February edit

 
Frankford Avenue Bridge over the Pennypack Creek in Northeast Philadelphia

March and April edit

 
The Schuylkill Parkway freeway stub in Bridgeport

May edit

 
US 25 on Gratiot Avenue in Detroit in 1941

June and July edit

August edit

September edit

 
I-180/US 85/I-25 BUS at its northern terminus at US 30/I-80 BUS in Cheyenne

October edit

November edit

December edit

 
Marquette–Negaunee Road in 1917

2016 edit

January edit

 
Main Street and the Hotel Jerome

February edit

March edit

 
The Chickasaw Turnpike westbound at Mile 13

April edit

 
Old and new route numbers at the intersection with US 191 in Monticello

May edit

 
Bridge over Hanalei River on Hawaii Route 560

June edit

 
Viewed from the east end of the Evergreen Point Floating Bridge in Medina shortly after opening in April 2016

July edit

 
The Arroyo Seco Parkway looking south from Marmion Way, showing the differently-colored passing lanes

August edit

September edit

October edit

November edit

 
The Tridge in winter

December edit

2017 edit

January edit

February edit

March edit

April edit

 
The Blue Ridge Parkway near Grandfather Mountain

May edit

June edit

July edit

August edit

 
1955 map of the proposed Michigan Turnpike

September edit

 
View north from the south end of MD 995

October edit

November edit

 
Abandoned section of the Pennsylvania Turnpike

December edit

 
The "Tunnel of Trees" between Harbor Springs and Good Hart

2018 edit

January edit

 
Orchard Pond Parkway route marker

February edit

March edit

April edit

 
J. F. Roberts Octagonal Barn, located on Missouri Route 48

May and June edit

July edit

 
Alabama route 10 and 141 signs as posted in Easthampton, Massachusetts

August edit

 
Interstate 78 across the Watchung Reservation in New Jersey

September edit

October edit

November edit

December edit

2019 edit

January and February edit

 
M-10 (Lodge Freeway) passing under Cobo Hall

March edit

 
Drawbridge at Tilghman Island, Maryland

April edit

 
View along MD 797, which follows State Circle in Annapolis

May edit

 
Hand-painted centerline on state highway M-15 in Marquette County, Michigan in 1917
  • ...that, according to the Michigan Department of Transportation, the first highway centerline in the US (pictured) was painted on the first designation of M-15 in 1917?
  • ... that none of State Highway 32 as it was originally designated through southwestern Oklahoma in 1934 is a part of the current route?
  • ...that speed limits on Guam Highway 1 may differ depending on which side of the road you are on?
  • ...that in the 1950s, four service plazas on the Garden State Parkway had uniformed female employees known as the "Park-ettes" whose duties included providing directions and other information to motorists as well as rendering odd bits of service such as sewing a missing button on a patron's coat?
  • ...that California State Route 174, which includes a historic 1924 bridge, was not designated a State Scenic Highway due to opposition by residents concerned about their property rights?

June edit

 
Mileage sign at the eastern terminus of I-70 near Baltimore

July edit

 
Westbound view on beginning of US 50 in Ocean City, with an overhead sign giving the distance to the western terminus in Sacramento, California

August edit

 
Sign at beginning of westbound US 6 in Provincetown, Massachusetts

September edit

 
Sign for US 20 at Kenmore Square, near the Boston Citgo sign

October and November edit

 
Mileage sign at the western terminus of US 50

December edit

 
US 6 heading east from Bishop, California

2020 edit

January edit

 
Sign at western origin of US 20 in Newport, Oregon

February edit

 
Seney Stretch along M-28

March edit

 
Approaching Donner Pass from the east on Lincoln Highway / old US 40, April 2007

April edit

 
Road sign for Zzyzx Road in California

August edit

 
Arroyo Seco Parkway looking south from Marmion Way