3:40 p.m. update
York Regional Police report that Highway 11 is expected to remain closed from Holland Landing through to Bradford for at least three more hours while the clean up in the intersection of Bathurst Street Highway 11 continues.
Original story: 1:50 p.m.
York Regional Police is reporting a collision on Highway 11 involving three tractor trailers. One has reportedly rolled over and there is fluid leaking across the roadway.
Highway 11 from Holland Landing through to Bradford is expected to be closed for several hours as crews and investigators attend the scene.
Motorists are asked to avoid the area and York Regional Police recommends planning an alternate route.