U.S. Route 140 (Pennsylvania "Legislative Route 42") was a U.S. highway connecting Gettysburg, Pennsylvania to Baltimore, Maryland. The route was deleted from the system in 1979; today the road's route is followed by portions of Pennsylvania Route 97, Maryland Route 97, and Maryland Route 140. Though it had no historical significance in the battles fought at Gettysburg, it became important as the route to take to view the historic battlefields and cemetery there.