OPP are warning motorists about the slippery driving conditions on area highways after several collisions occured in the region Wednesday. A driver of a GMC Jimmy was west bound on Highway 11/17 when the driver lost control and rolled the vehicle into the ditch. A two vehicle collision also occured yesterday at the intersection of Gronroos Road and Copenhagen Road.Finally, police were called to another vehicle rollover on Highway 11 after the driver lost control of his truck. OPP say the cold weather is causing area roads to be covered in ice and frost.