The following highways are numbered 718:
| Preceded by 717 | Lists of highways 718 | Succeeded by 719 |
State Route 111 is a state highway in the U.S. state of California. It is the main north-south route and retail corridor through the Coachella Valley, a part of the Colorado Desert in the southeastern corner of the state and a famous resort destination. It also runs through the Imperial Valley, and along the eastern shore of the Salton Sea. Its southern terminus is at Imperial Avenue and 1st Street in Calexico, at the former entrance to the Calexico West Port of Entry. SR 111's northern terminus is at Interstate 10 at the northwestern corner of the Palm Springs city limits, near the unincorporated community of Whitewater.
State Route 178 is a primary state highway in the U.S. state of Virginia. The state highway runs 11.51 miles (18.52 km) from U.S. Route 13 Business in Exmore north to SR 620, SR 628, and SR 718 at Bobtown. SR 178 connects Exmore in far northern Northampton County with Belle Haven and Pungoteague in southern Accomack County.
State Route 305 is a 33.99-mile (54.70 km) long east–west state highway in the northeastern portion of the U.S. state of Ohio. The western terminus of SR 305 is at a signalized intersection with the duplex of SR 82 and SR 700 in the village of Hiram. Its eastern terminus is at a five-way stop intersection on the Pennsylvania state line nearly 1.75 miles (2.82 km) south of Orangeville. Picking up where SR 305 leaves off heading southeast into Pennsylvania from this intersection is PA 718.
Pennsylvania Route 718 is an 11.1-mile-long (17.9 km) state highway located in Mercer County, Pennsylvania. The southern terminus is at PA 318 in Shenango Township. The northern terminus is the Ohio state line in South Pymatuning Township.
State Route 6 (SR 6) is a state highway that is unsigned. It travels through the central part of the U.S. state of Tennessee from Lawrence County to Sumner County. The highway is related to the following U.S. Highways:
State Route 106 is a north–south state highway in Middle Tennessee. The highway is a secret, or hidden, designation for the following highways:
