Those traveling on Interstate 5 and Highway 89 in the Mt. Shasta area should be prepared to install tire chains unless they have snow tires or four-wheel drive.

R-1 chain restrictions are being enforced at several locations, according to the Caltrans website. Checkpoints are at the following places:

• Southbound I-5 at South Weed
• Northbound I-5 at Mott Road
• Northbound I-5 at South Dunsmuir
• Northbound I-5 at a point 16 miles south of Dunsmuir
• Southbound Highway 89 at the junction of I-5
• Northbound Highway 89 at McCloud

According to the California Highway Patrol’s traffic incident website, there have been several non-injury collisions reported this morning, including a vehcile that had taken out the I-5 guard rail near Sweetbriar; a vehicle that slid into a ditch on I-5 near Lassen Lane and a collision at the junction of College Avenue and Old Stage Road.