ST. LOUIS — Because of Saturday morning’s wintry weather mix, two overturned tractor-trailers caused a big accident in Collinsville that stalled traffic.

The wreck happened in the westbound lanes of Interstates 55 and 70. Fox 2’s Andy Banker saw the pileup firsthand. At least three tractor-trailers were involved in a crash with several other cars.

If crossing bridges and elevated roads, slow down, drive carefully, and watch out for weather hazards.