- ...that Interstate 238 is signed north/south, but is actually an east/west route?
- ... that New York State Route 18 once extended as far south as Pennsylvania and as far east as Webster?
- ... that M-95 in Michigan has been named for Leif Ericson, the Norse explorer?
- ... that New Mexico State Road 4 forms the core of Jemez Mountain Trail National Scenic Byway, with trails to Puebloan ruins, a 10,199-foot (3,109 m) mountain, and a 70-foot (21 m) waterfall from roadside turnouts?
- ...that the eastern terminus of Interstate 70 is at a park and ride lot in Baltimore?