- ...that the Smyrna Rest Area along U.S. Route 13 in Smyrna, Delaware, is home to the Delaware Highway Memorial Garden, which has a path with bricks bearing the names of people who died along roads in Delaware?
- ...that California State Route 266 has more connections to Nevada State Routes than California's road network?
- ...that Puerto Rico Highway 52 was the first toll road in Puerto Rico?
- ... that in 1919, Michigan was the second state to sign numbered highways after Wisconsin?
- ... that Washington State Route 124 follows the route of the Lewis and Clark National Historic Trail from Piper Canyon Road to its eastern terminus in Waitsburg?
