Police and emergency services were on the scene of a multi-vehicle crash in Caledon Monday. Cars were in ditches and a tractor trailer was overturned against a hydro pole. Ontario Provincial Police say the horrific crash happened at around 3:20 p.m. this afternoon. ORNGE confirmed that one person was taken to St. Michael’s hospital with critical injuries. OPP say Highway 10 southbound fully opened at 8:20 p.m., however, one northbound lane remains closed to allow for hydro repairs. Earlier in the day, OPP said that a transport truck allegedly rear-ended several vehicles.