Detours are in place after a tractor and air seeder struck an overhead road sign on Main Street North near the Highway 1 overpass.

The northbound lanes of Main Street North are closed at the Diefenbaker Drive intersection.

According to the Moose Jaw Police Service, the air seeder, being pulled by a semi truck, hit the sign at around 12:50 p.m. this afternoon.

Traffic is being detoured onto Diefenbaker Drive. Police are asking motorists to avoid the area as the highway will be blocked for an unknown amount of time.