via Highway 4 or Wonderland Road. The freeway generally uses Parclo A2 and Parclo B2 designs for interchanges. Exceptions include the Front Street interchange in Sarnia, which is a hybrid of a diamond and Parclo B2 interchange (previously a Parclo AB2 until the mid-2000s), and the Highway 40 interchange which is a Parclo B-4. There is presently no interchange using the full six ramp Parclo A4 layout (a common design on other Ontario freeways) on the entirety of Highway 402; although several interchanges do have five ramps, while the junction with Indian Road was previously a Parclo A4 until the directional ramp in the NW quadrant was removed and replaced with a signalized left turn in the late 1990s. History Planning for the route that would become Highway 402 began following the completion of the Blue Water Bridge in 1938. A divided highway was constructed through Sarnia following World War II; it was completed and designated in 1953. The Department of Highways announced its intent to extend the route to Highway 401 in 1957. However, while some preliminary work began in the early 1960s, it would take until 1968 for a preferred route to be announced, and until 1972 for construction to begin. Work was carried out through the remainder of the 1970s, and the freeway was completed and ceremonially opened in late 1982. Since completion as a four-lane route, expansion work has been concentrated on the portion of the freeway in Sarnia approaching the border crossing. Construction Highway 402 is one of the original 400-series highways. It was numbered in 1953, a year after Highway 400 and Highway 401. The short dual highway was built as an approach to the Blue Water Bridge, which itself opened to traffic October 10, 1938. 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. Ultimately, Highway 402 was designated with the intent of extending it to Highway 401. This was formally announced by the Department