- ..that the Prospect Mountain Veterans Memorial Highway (pictured) is the only reference route in New York owned by the New York State Department of Environmental Conservation?
- ...that Route 54 passes the stone boundary marker denoting the junction of the Transpeninsular Line and the southern end of the Mason–Dixon Line between Mardela Springs, Maryland, and Delmar, Delaware?
- ... that Colorado State Highway 35 is so short that two interchanges overlap each other?
- ... that 2⅓ miles (5.8 km) of Iowa Highway 316 form the border between Marion County and Warren County, Iowa?
- ... that Furnace Brook Parkway, a historic road in Quincy, Massachusetts, is named for a stream at the site of the first iron blast furnace in the United States, built in 1644?