Area overview - congestion in Rancho Cucamonga, Ontario, Corona, Riverside 7:33 a.m.

The southbound 15 Freeway at Foothill Boulevard and Base Line Road in Rancho Cucamonga is congested due to a traffic collision. The northbound 15 Freeway at Philadelphia Street is also moving slowly, as is the westbound Highway 91 at Main Street in Corona and the eastbound 91 at Arlington Avenue.