US Route 60 and US Route 70 were 1930s era additions to the US Route System within Southern California. Both US Route 60 and US Route 70 were both major transcontinental highways which spanned the width of the United States at their maximum extent. This blog features the alignment history of US Route 60 and US Route 70 from Los Angeles east to Pomona. Featured as the blog cover is US Routes 60-70-99 on a recently completed segment of the San Bernardino Freeway in West Covina.
The history US Route 60 and US Route 70 in the Los Angeles-Pomona corridor
The April 1937 California Highways & Public Works features the last divided highway link to open on the Los Angeles-Pomona Arterial alignment of US 99/US 60/US 70/LRN 26. The Los Angeles-Pomona Arterial is stated to having an anticipated completion during May 1937 and would provide 27 miles of continuously divided highway. The Los Angeles-Pomona Arterial is stated to have only two traffic signals.