- ...that the Anton Anderson Memorial Tunnel (pictured) uses computer regulated traffic controls to safely carry bi-directional automobile and train traffic through the single-laned tunnel?
- ...that the exit that connects the Hutchinson River Parkway and the Merritt Parkway over the New York–Connecticut state line is numbered 30 in New York, but 27 in Connecticut?
- ...that though primary east–west U.S. Route numbers end in 0, U.S. Route 2 broke this pattern so as to avoid having a U.S. Route 0?
- ... that at Harveys Lake, Pennsylvania, the Pennsylvania Department of Transportation signed Route 415 on two highways around the lake?
- ... that Kansas highway K-140's route was originally established in 1925 as U.S. Route 40S?