Interprovincial 3C

Interprovincial 3C (abbreviated I-3C and officially known as the Cajalco–Ramona Expressway) is a major west–east Interprovincial Highway serving the western region of the Inland Empire. It is an auxiliary route of I-3 and is about 51 miles (82 km) in length. It runs from to, existing as a  for much of its length.