Route 134 is a north–south highway entirely within the town of Dennis on Cape Cod. It is slightly over 5 miles (8.0 km) in length and has a full cloverleaf interchange at U.S. Route 6 (exit 9A/9B). Except for its termini, Route 134 is almost entirely located within the village of South Dennis.

This highway has maintained the same route since at least 1930. A one mile (1.6 km) section south of Route 6 was widened to four lanes in the 1980s due to heavy commercial development. The remainder of the highway is mostly residential.