Portal:U.S. roads/Did you know/November 2012

...that Interstate 75 (pictured crossing the Mackinac Bridge) is the only highway that exists on both the Upper and Lower peninsulas of Michigan?
...that the construction of the Hampstead Bypass along Maryland Route 30 was delayed in the 1990s due in part to a habitat of bog turtles?
... that U.S. Routes within Washington state currently make up about 1,800 miles (2,900 km) of the Washington highway system?
...that the only state-numbered highways shorter than one mile (1.6 km) in the Massachusetts highway system are Route 15 and Route 108, which are extensions of the same-numbered highways in Rhode Island and New Hampshire, respectively?
... that Mississippi Highway 198 is the designation given to former alignments of U.S. Highway 98 in the state?