- ...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 a controversy occurred when the Daniel Boone Parkway in Kentucky was renamed to the Hal Rogers Parkway, after a congressman who had secured funding to get tolls removed from the road?
- ...that the Brooklyn–Queens Expressway portion of Interstate 278 was the subject of a Sufjan Stevens album entitled The BQE recorded in 2007?
- ...that Nevada State Route 447 is the access to the site of the Burning Man festival?
- ...that North Carolina Highway 3 switched designations with North Carolina Highway 136 in 2002 to honor the late Dale Earnhardt, a NASCAR driver who drove the #3 car?