A two-car crash was snarling traffic on westbound Interstate 94 in Ann Arbor Monday morning.

The cars were on the right shoulder of the road near the intersection with U.S. 23, a dispatcher with the Washtenaw County sheriff’s department said. State police had not yet arrived at the accident, the dispatcher said at 9:08 a.m.

A Google traffic map showed a backup on the freeway on either side of the U.S. 23 interchange.

Traffic slowdowns are shown in yellow and red on the map.