2009:

• 13.4 kilometres of new lanes from Markham Road to York/Durham Line
• A brand new ramp at Ninth Line
• Widening of the bridges between Highway 404 and Markham Road
• Widening of the overpass at Highways 407 and 401

2008:

• $25 million was invested to widen the bridges from Markham Road to York/Durham Line

2007:

• $60 million was invested to add 50 kilometres of new lanes between Highways 401 and 427

2006:

• $60 million was invested to add 50 kilometres of new lanes between Highways 427 and 404
• $30 million was invested to widen bridge structures between Highways 410 and 427 in preparation for additional lanes
• $3.5 million was invested to add 4 kilometres of new lanes between McCowan Rd. and Markham Rd.

2005:

• $30 million was invested to widen bridge structures between Highways 400 and 404 in preparation for additional lanes

2004:

• $30 million was invested to add 22 lane kilometres between Highway 401 and Hurontario St.
• $7.5 million was spent on constructing the Markham Bypass Interchange

2003:

• $6 million was invested to add 7 lane kilometres between Highways 400 and 427

2002:

• $5 million was invested to complete the Woodbine Ave. interchange

1999:

• Over $500 million was invested to extend the highway 25 kilometres west to Burlington and 15 kilometres east to Pickering
• Over $40 million was spent on completing four interchanges (Mavis, Britannia, Kennedy and McCowan)