King's Highway 31, commonly referred to as Highway 31 and historically known as the Metcalfe Road, was a provincially maintained highway in the Canadian province of Ontario. The route connected Highway 2 in Morrisburg with the Chaudière Bridge at the Ontario–Quebec boundary in downtown Ottawa. Established in 1927, Highway31 originally extended from Highway2 north to the Stormont, Dundas and Glengarry – Carleton county line. It was extended into Ottawa in 1936, and had several routings through the city over the years. The southern terminus was altered with the construction of the St. Lawrence Seaway in 1958, and a bypass of Winchester was opened in 1974. The entire highway was decommissioned in 1997 and 1998, and transferred to lower levels of government. It has since been known as Stormont, Dundas and Glengarry (SDG) County Road31 outside of Ottawa, and Ottawa Road31 and several local names within Ottawa, notably Bank Street and Bronson Avenue. Route description Highway31 was a south–north route that somewhat paralleled Highway 16 between the St. Lawrence and Ottawa rivers. It travelled in a north–northwest direction across eastern Ontario, servicing the communities of Morrisburg, Williamsburg and Winchester, as well as travelling into downtown Ottawa via Gloucester. Since then, it has been known as Stormont, Dundas and Glengarry (SDG) County Road31 and Ottawa Road31. At the time it was decommissioned in 1997 and 1998, Highway31 began at Highway2 in the community of Morrisburg, approximately from the shores of the St. Lawrence River. Today, this intersection is now a roundabout. It travelled northerly, passing over the CN Kingston Subdivision next to Morrisburg Station, a former Via Rail stop that was closed in 2021. The route crossed Highway 401 at an interchange (Exit750) and proceeded to be surrounded by farmland. It travels through the community of Glen Becker, Williamsburg and The Sixth as it crosses the municipality of South Dundas. The route then enters the municipality of North Dundas at Winchester Springs, near which it crosses several creeks and irrigation drains. It passes through the community of Cass Bridge, providing access to the conservation area of the same name, before encountering the eastern leg of former Highway43. Highway31 and Highway43 travelled concurrently as they bypassed southwest of Winchester, crossing over the CP Rail Winchester subdivision along the way. To the west of the village, the two routes parted ways, and Highway31 continued north. It passed through the community of Cloverdale, then swerved