Construction on the $2.1-billion Gordie Howe International Bridge, which will run between Detroit and Windsor, Ontario, could begin as early as next year. The Canadian government’s non-profit Windsor-Detroit Bridge Authority is set to issue early this summer its request for proposals to design, build, finance and maintain the 1.5-mile crossing to three short-listed multinational teams: Legacy Link Partners, headed by SNC Lavalin and American Bridge Co.; Bridging North America, composed of Canadian units of ACS Infrastructure, Fluor and Dragados; and CanAm Gateway, led by EllisDon Corp. and Bechtel Canada. A final selection is set for year-end. The selected team also will build ports of entry on both sides of the bridge and upgrade a nearby highway interchange. Construction is set to finish in 2020, providing an alternative to the nearly 90-year-old, privately owned Ambassador Bridge.