The Vanceboro–St. Croix Border Crossing connects the towns of Vanceboro, Maine and Saint Croix, New Brunswick on the Canada–United States border. The Canadian government has at times called this crossing McAdam, named for the larger municipality east of St. Croix. In the early 1900s, this crossing was located at the adjacent lock structure a short distance to the north. At some point in the distant past, a bridge existed to the south of the railroad bridge, extending from Public Crossing Road on the Canadian side. Concrete footings for this bridge remain on the US side at this site.