west to avoid the community of Harmony before entering what was then known as the Regional Municipality of Ottawa–Carleton at Marionville Road. Within the former Osgoode Township the highway bisected the village of Vernon and the community of Spring Hill before beginning to meander northeast. It crossed the North Castor River at Greely, then entered the city of Gloucester at Regional Road8 (Mitch Owens Road). Within Gloucester, Highway31 travelled straight north-northeast through the community of Leitrim before once again meandering northeast. It entered the bedroom community of Blossom Park before crossing into the city of Ottawa at Regional Road32 (Hunt Club Road). Within Ottawa, Highway31 continued as a Connecting Link, following Bank Street through the South Keys neighbourhood and crossing CN's Walkely Line into the Heron Gate neighbourhood. It turned west onto Regional Road16 (Heron Road). It turned north onto the Airport Parkway, which becomes Bronson Avenue upon crossing the Rideau River. Highway31 followed Bronson Avenue, meeting an interchange with Highway417 (the Queensway), and turning southwest onto Albert Street. It then turned north onto Booth Street and ended at the Ontario–Quebec boundary on the Chaudière Bridge over the Ottawa River, where it continued as Eddy Street into Hull. History Assumption and paving Highway31 was first established as a provincial highway on July2, 1927, when of roads were assumed by the Department of Public Highways within the townships of Williamsburgh, Winchester and Mountain. The highway inexplicably ended at the Dundas–Carleton county boundary south of Vernon for the next decade. On July29, 1936, the highway was extended into Ottawa when the Metcalfe Road through Osgoode and Gloucester townships in Carleton County was assumed by the renamed Department of Highways (DHO); it was now long. While the Metcalfe Road was already fully paved by the time Highway31 was established, the portion of the route assumed in 1927 was unpaved in its entirety. Paving of the highway with a concrete surface began in the early 1930s; the first portion, from Winchester north to the Dundas–Carleton county line, was completed in 1931, a distance of approximately . Just over of the route, from Morrisburg to Williamsburg, was paved in 1933. This was followed in 1934 with another of paving south from Winchester. The final 7.25-kilometre gap north of Williamsburg was paved in 1936. Realignments and route changes While the southern terminus of Highway31 was always at Highway2, the construction of the St. Lawrence Seaway in