All motorists who use the Thorold Tunnel for their commute to and from Brock will need to use an alternate route on Thursday, Oct. 17 — and possibly for longer than that.

A traffic accident on Wednesday morning damaged the interior of the tunnel. Police say lanes in both directions will remain closed on Thursday and maybe longer, depending on the extent of structural damage caused by the accident.

Police are encouraging those who would typically use the tunnel to use the Homer, Glendale Ave. and Allanburg bridges as alternate routes over the Welland Canal.