Prior to that, the four-lane, divided "Deas (Island) Throughway" which was completed to the U.S. border in 1962, was designated Highway 499.

Highway 99A was decommissioned by the province in 2006 and the city of Surrey renamed "King George Highway" to "King George Boulevard" in 2009,[2] although, as of July 2021, the Ministry of Transportation keeps two minor segments of the former route maintained in its inventory.

Highways 1A and 99A continued northwest for 6 km (3.7 mi) to the Pattullo Bridge over the Fraser River, crossing from Surrey into New Westminster.

In Vancouver, Highway 99A continued on Kingsway northwest for 7 km (4.3 mi), then onto Main Street.

In 1968, the Douglas-Grandview Highway was renamed Canada Way in honour of the Canadian Centennial which was a year earlier.