sentences:  The road begins north of Steeles Avenue East, which serves as the boundary between Markham and Toronto.A two-laned Ninth Line curves northeast after crossing and being crossed by two separate railway tracks (the Canadian Pacific (CP) Havelock Subdivision and the Canadian National (CN) York Subdivision) and becomes Donald Cousens Parkway, expanding to four lanes and travelling along the eastern fringe of the community of Box Grove, alongside which it was built in the mid-2000s.On the west side is a new residential subdivision, while on the east side beyond the CP Havelock subdivision, which the road parallels, is the completely undeveloped Bob Hunter Memorial Park.