Originally intended to be called Murray Bridge, the Big Dam Bridge in Arkansas spans the Arkansas River and Murray Lock and Dam between Little Rock and North Little Rock and is open only to pedestrian and bicycle traffic. At 4,226 feet (1288 m) in length it is the longest pedestrian/bicycle bridge in North America that has never been used by trains or motor vehicles. It rises to 90 feet (27 m) over the Arkansas River and 30 feet (9.1 m) over the dam. The span over the river is 3,463 feet (1055 m), with the ramps on either side of the river accounting for the rest of the length.