San Bernardino–Riverside Line

Construction on the line north from Riverside began in 1908, but was ceased due to a disagreement between Pacific Electric owner Henry E. Huntington and Union Pacific President E. H. Harriman.[1]

Service began in Riverside on April 7, 1911,[1] operating on Main Street, First Street, and La Cadena Drive as far north as Center Street in West Highgrove.[2] In 1913, work began to complete the line, with an extension north to Colton opening on October 4, 1913 and completing to San Bernardino station on December 13.[2]

By January 1916 through-routing with the Redlands Line had begun, forming the Redlands–Riverside Line. Between April and June 1928 through-routing was changed to the Riverside–Arlington Line as part of a scheme developed by the California Railroad Commission; it was reverted back to Redlands after proving unsuccessful. A major service reduction took place on July 20, 1936 as through-routing was discontinued entirely, and headways became sparse and irregular. By this time, service was primarily provided to interchange with transcontinental trains in Colton. Passenger cars were virtually discontinued after February 1, 1938 with a single round trip making runs at inconvenient times very early in the morning. This lasted until May 7, 1939 when the service was discontinued.[2]