The Macdonald-Cartier Bridge (French: Pont Macdonald-Cartier) is a bridge connecting Ottawa, Ontario, to Gatineau, Quebec. The bridge is a 618 m (2,028 ft) long continuous steel box girder bridge and carries six lanes of traffic. It links King Edward Avenue and Sussex Drive in Ottawa with Autoroute 5 in Quebec. It is the easternmost bridge linking Ottawa to Gatineau, running just east of the Alexandra Bridge.
There are sidewalks on both sides of the bridge intended for use by pedestrians and cyclists. Immediately after the bridge on the Gatineau side, the road becomes part of the Autoroute where cyclists and pedestrians are prohibited. However, they can then use paths leading to Laurier Street.