Caledonia, by some time in the 2010s. As the road meets Highway 403, Highway 6 merges with Highway 403, and there is a concurrency for 17 kilometres within Hamilton. The concurrency ends at the Highway 6 junction, at the Hamilton/Burlington boundary, near the Royal Botanical Gardens where Highway 6 turns northward. Hamilton to Guelph Though most of the route is five lanes — two travel lanes in each direction, plus one centre lane for left turns — the section in Wellington County from Puslinch to Morriston has remained two lanes because of its route through several small towns and a lack of available property for widening; this area therefore suffers from significant congestion. A new alignment, connecting to the Hanlon Expressway at Highway 401, is being considered to bypass this troubled section. The section where Highway 6 is concurrent with Highway 401 has the highest AADT (Annual Average Daily Traffic), at 85,000 automobiles per day in 2002. High travel speeds in the five-lane section, and typical flow varies between . The section of Highway 6 between Highway 403 in Hamilton and Clappison's Corners (the intersection at Hwy 5 West) was converted in 2009 to a controlled access freeway with an interchange at York Road. The interchange opened on May 23, 2009, and simultaneously, the intersection where Northcliffe/Plains Road met Highway 6 was closed permanently. (A new service road was built on either side to connect Plains Road and various other residential streets to the York Road interchange.) This section of Highway 6 has two southbound lanes and three northbound, the extra lane being for trucks climbing the steep escarpment, as well as high mast lighting and a full concrete median barrier. In Guelph, the road travels along the full length of the Hanlon Expressway - a 4-lane, controlled access and divided highway with mostly signalized level intersections. The Ministry of Transportation is presently investigating the possibility of changing these intersections into grade-separated interchanges. For 4 km Highway 6 is concurrent with Highway 7, from the Wellington Street interchange north to where the Hanlon Expressway ends at Woodlawn Road. At Woodlawn, Highway 7 turns west onto Woodlawn Road, while Highway 6 turns east onto Woodlawn Road. Following Woodlawn, Highway 6 then turns north onto Woolwich Street, leaving the city of Guelph. Guelph to Owen Sound As Highway 6 leaves Guelph and heads northwards through Wellington County, it narrows to two lanes