 On April 16, 1970, the Highway 85 designation was moved from King Street to the new Conestoga Parkway; King Street was consequently transferred to local jurisdiction. Towards the end of the 1970s, construction began on a northward extension of the Conestoga Parkway from King Street to Northfield Drive; this was completed by 1977. By then, construction was underway on a two lane bypass of St. Jacobs east of the original route, connecting with the Conestoga Parkway at Northfield Drive, then an at-grade intersection. By the end of 1977, this bypass was completed.
