- ... that in July 2005, signage at the intersection of Massachusetts Route 10 and Massachusetts Route 141 (pictured) identified the routes with Alabama route markers?
- ... that during the "Southbelt Shuffle" event on M-6 south of Grand Rapids, Michigan, horses were ridden on the partially completed freeway?
- ... that during the construction of New York City's Van Wyck Expressway, a four-story apartment building was placed on metal rollers and relocated away from the expressway's path?
- ...that U.S. Route 50 in California was the route traveled by many '49ers and the Pony Express, and later became California's first state highway and a branch of the Lincoln Highway?
- ... that the Baltimore–Washington Parkway was once planned to be a part of Interstate 295, but never did because not enough funds were available to upgrade the road to Interstate Highway standards?