- ...that the State Circle in Annapolis is designated Maryland Route 797 and has a circumference of 0.27 miles (0.43 km)?
- ...that Rolling Road in Baltimore County is named for the now obsolete tobacco hogsheds being rolled to the port down the road?
- ...that the first modern roundabout on the Maryland highway system was constructed at the intersection of Maryland Route 94 and Maryland Route 144 in Lisbon in 1993?
