407 corridor and the Canadian National Halton Subdivision. A stretch of Steeles Avenue will be widened from east of Tapscott Road to just east of Ninth Line from 2020 to 2024. Route description Starting from the east, the road begins at Scarborough-Pickering Town Line/York-Durham Line, although east of the town line, the road continues as Taunton Road or Durham Regional Road 4. Taunton Road continues as is until reaching Highway 35, where it becomes Concession Road 6, then after a turn, will become East Town Line, then to 6th Line, before ending at County Road 65. Steeles is a two-lane rural road until east of Markham Road. It becomes a four lane suburban road with bicycle lanes on each side between Markham and Kennedy Roads, six lanes from Kennedy to Victoria Park Avenue, and eight lanes from Victoria Park to the interchange with Highway 404. West of there, it alternates between four and six lanes the rest of way to Albion Road. Like many other east–west arterial roads within Toronto and York Region, Steeles is divided into east and west segments by Yonge Street. Although on the boundary between the two municipalities, the Toronto-York Region portion of the road is maintained by Toronto. As a result, limited planning authority is granted to Toronto over York Region for lands that is within of Steeles; formalized through a 1974 agreement between Metropolitan Toronto (succeeded by the amalgamated City of Toronto) and York Region. For instance, Toronto city councillor David Shiner invoked the 1974 agreement to veto a proposed condo development that would replace the Shops on Steeles mall. Due to an ongoing dispute on the widening and maintenance costs of Steeles, York Region's proposed Markham Bypass to Morningside Avenue has been stalled. The areas around the street in Toronto and York Region consists of farmland (within the Rouge National Urban Park) in the east, a mix of commercial and residential in the middle, and industrial zones near the west. West of Albion Road, Steeles Avenue continues into Brampton in Peel Region, where it is also designated as Peel Regional Road 15. Like the section in Toronto, Steeles Avenue has east–west segments, this time on either side of Hurontario and Main Streets. Steeles Avenue continues into Halton Region, where it is also designated as Halton Regional Road 8, through the town of Milton, crossing Highway 401 (no interchange) and ending at Appleby Line