The Honoré Mercier Bridge in Quebec, Canada, connects the Montreal borough of LaSalle on the Island of Montreal with the Mohawk reserve of Kahnawake and the suburb of Châteauguay on the south shore of the Saint Lawrence River. It is the most direct southerly route from the island of Montreal toward the US border. It carries Route 138, originally Route 4. It is 1.361 km (0.846 mi) in length and contains four steel trusses on its first section. The height of the bridge varies from 12.44 m (40.8 ft) to 33.38 m (109.5 ft) with the highest sections located over the St. Lawrence Seaway.