Traffic from the Coachella Valley and Las Vegas towards the Inland Empire and Los Angeles was as bad as could be expected Sunday, according to state officials.
Westbound Interstate 10 traffic at North Palm Springs was plodding along at an average speed of six miles per hour, according to traffic sensors.
A CHP dispatcher in Indio said there was a 40-mile-long line of slow-and-go traffic heading west from the desert resort cities, from Cathedral City to Beaumont.
Traffic flowed better further to the west, but slowed to a mere 24 miles per hour on westbound Route 60 through Moreno Valley.
Traffic on eastbound Route 60 was snarled by a 2:09 p.m. crash at its junction with Interstate 10 at Beaumont, which caused a backup all the way through the Badlands.
On Interstate 15, traffic heading towards Riverside, San Diego and Los Angeles was winding through Cajon Summit at 48 miles per hour on the four-lane freeway downgrade.
Very heavy traffic was observed, but it was moving near the speed limits on Interstate 5 from Tejon Summit all the way to the Mexican border. On U.S. 101, a crash snarled L.A.-bound traffic near Carpinteria, but the Ventura (101) Freeway was flowing smoothly.