West Parry Sound OPP is asking drivers to be alert when heading through intersections. New traffic lights have been installed at the intersection of James Street and Mary Street in Parry Sound. West Parry Sound OPP says drivers must come to a complete stop for all stop signs and red traffic lights. Police say yield at the stop line if it is marked on the pavement. The OPP also adds that drivers should proceed carefully when passing through a green light.