Construction of the Line 5 Interchange in the Town of Bradford West Gwillimbury. The highway improvement project includes replacement of the existing 5th Line two-lane structure with a new underpass structure (including four travelled lanes and two turning lanes), new interchange ramps, widening of Line 5, creek realignment in the north west quadrant, realignment of Side Road 5, realignment of Coffey Road, storm water management infrastructure, grading, structural culverts, guiderails, signs, drainage, illumination, traffic signals, utility relocations, hot mix paving, granulars, landscaping, detours, signing, pavement markings, Hwy 400 centre median works, Hwy 400 resurfacing, new driveways, removal of existing Line 5 fill, monitoring pins, settlement monitoring, preloading, surveying and geotechnical.