Bolsover; the severed section was renumbered as an extension of Highway 48, bringing it to its peak length of . The new section of highway between Highway 12 and Bolsover was reconstructed over the following year, opening to traffic on August 19, 1976. The section between Highway 401 and the then-unopened Highway 407 interchange was turned over to the Region of York and the City of Toronto on April 1, 1995, and is known as Markham Road south of Highway 407, and Main Street thereafter to Sixteenth Avenue, where the name Markham Road resumes for until Major Mackenzie Drive. The section within York Region is also designated as York Regional Road 68. On January 1, 1998, the section of Highway 48 between its southern junction with Highway 12 and Coboconk was transferred to the Regional Municipality of Durham and Victoria County (now Kawartha Lakes), removing the concurrency with Highway 12 in the process. The section from Highway 12 to Highway 35 is now known as Portage Road and signed as Durham Regional Highway 48 and Kawartha Lakes Road 48. Major intersections References Footnotes Bibliography External links Ontario’s Highways 48 048 East Gwillimbury Georgina, Ontario Roads in Markham, Ontario Whitchurch-Stouffville