- ...that, although the first section of Washington State Route 520 opened in 1963, the 13-mile (21 km) freeway wasn't fully completed until 1981?
- ...that in 1993, the New York State Thruway became the first road to implement the E-ZPass electronic toll collection?
- ...that Interstate 87 in North Carolina and Virginia is numbered in honor of important dates in the history of both states, such as the founding of the Roanoke Colony in 1587, the Virginia Plan helping to develop the U.S. Constitution in 1787, and the creation of North Carolina State University in 1887?
- ... that M-17 used to extend across the Lower Peninsula of Michigan, but now it only runs from Ann Arbor to Ypsilanti?
- ...that Maryland Route 700 was constructed in 1941 to provide an improved connection to the Glenn L. Martin Company aircraft manufacturing plant as the United States entered World War II?
