As such, the highway was named the Blue Water Bridge Approach. Construction began in 1939. However, like many other road projects, World War II halted construction. In 1947 a new survey was undertaken; construction resumed by 1952. The approach road was opened in 1953, at which point the route was designated Highway 402. It featured an interchange with Christina Street and at-grade intersections with Front Street, Indian Road and Modeland Road (the Highway 40 Sarnia bypass); after Modeland Road the route continued to London as Highway 7.