 It was the first US highway to be deleted in California and was one of the first few US highways to be deleted in the US.US 48 was a highway connecting the San Francisco Bay area with the San Joaquin Valley, traveling from San Jose to near Modesto, largely following the future routing of US 50, which replaced US 48.Its western terminus was located at former State Route 82 (SR 82), which was a former routing of US 101.