sentences:  In 1997, the Environmental Assessment for the Markham Bypass extension was completed, approving construction of an interchange at the future Ontario Highway 407 (then open only as far as Ontario Highway 404)
  and a divided roadway north from there to Major Mackenzie Drive.Construction on the two lane section between 16th Avenue and Major Mackenzie Drive, connecting with the north end of the Old Markham Bypass, began in 2002, and was completed by the end of 2004.Phase 2, which included construction of a partial interchange with Highway 407, began in 2004
  and was completed by the end of the year; it and the four lane section north of it to Highway 7 opened on December 17, 2004.