Mexican Federal Highway (carretera federal) No. 1 follows the length of the Baja California Peninsula from Cabo San Lucas (BCS), at the southern end to Tijuana (BC) in the north. The road turns into Interstate 5 at the international border with the United States south of San Ysidro, California.

Highway 1 is often called the Carretera Transpeninsular or Transpeninsular Highway and runs a length of 1711 km (1063 miles) from Tijuana to Cabo San Lucas.