High Quality Content by WIKIPEDIA articles! King`s Highway 48, also known as Highway 48, is a provincially-maintained highway in southern Ontario that extends from Major Mackenzie Drive in Markham, through Whitchurch-Stouffville, to Highway 12 south-east of Beaverton, Ontario. Prior to 1998, Highway 48 extended from Highway 401 in Toronto to Highway 35 in Coboconk with a total length of 128 km (80 mi). However, on January 1, 1998 the province transferred the responsibility of maintaining the southern and northern sections to the regional governments that those sections lie within.