High Quality Content by WIKIPEDIA articles! King`s Highway 402, commonly referred to as Highway 402 and historically as the Blue Water Bridge Approach, is a 400-series highway in the Canadian province of Ontario that connects the Blue Water Bridge international crossing near Sarnia to Highway 401 in London. It is one of two vital trade links between Ontario and the Midwestern United States. The freeway is four-laned and controlled access for nearly its entire length, except on the approach to the Blue Water Bridge, where it widens.