Existing first between the Danforth Road (now Painted Post) and the town, it was later extended south to Kingston Road and north to Stouffville. Alongside the construction of the "Toronto Bypass" (now Highway 401), Highway 48 was extended south, from near Beaverton, to where Markham Road would intersect the new "superhighway". It was originally intended to be upgraded to a freeway that would wrap around the eastern side of Lake Simcoe and end in Orillia or north of Sutherland. However, with the construction of the Don Valley Parkway, Woodbine Avenue would be chosen in its place, becoming Highway 404. The Toronto Transit Commission's 102 Markham Rd provides service along the length of the road. It operates from Warden station on Line 2 Bloor–Danforth and terminates at Steeles Avenue in Toronto, and on its 102D branch terminates at Major Mackenzie Drive in Markham. The Markham Rd. name continues into York Region where it ends at Major Mackenzie Drive. Markham Road begins at Hill Crescent, south of Kingston Road. It proceeds through Scarborough to Steeles Avenue East, but continues into York Region, where it is also designated as York Regional Road 68. Between Eglinton Avenue and Lawrence Avenue, the road crosses the Highland Creek ravine; one of the only crossings of the ravine not bypassed by a high-level bridge. South of Sheppard Avenue, most of the route is abutted by a mix of apartments and commercial strip plazas. North of Sheppard is occupied entirely by expanses of industrial land. North of Steeles and south of Highway 407 is occupied by big box stores and plazas. North of Highway 407, it is named Main Street Markham in Markham Village, that city's historic, original downtown. Marlee Avenue used to be known as Lyon Avenue (southern segment in York) and Woodmount Avenue (northern segment in North York). The name was changed in 1953 at the request of Bernice Stein, who lived at 184 Woodmount Avenue. It is named for Mrs. Stein's niece. In addition, after the name change, both segments were connected and straightened. Marlee Avenue connects Eglinton Avenue West with Lawrence Avenue West to the west of Allen Road. At its northern end, it has a terminating vista of Lawrence Allen Centre. Martin Grove Road is an artery commencing at Bloor Street West but not becoming a major road until intersecting with Burnhamthorpe Road.