Louis-Hippolyte Lafontaine Bridge-Tunnel

The Louis-Hippolyte Lafontaine Bridge–Tunnel (Pont-Tunnel Louis-Hippolyte-La Fontaine) is a highway bridge–tunnel running over and beneath the Saint Lawrence River. It connects the Montreal borough of Mercier–Hochelaga-Maisonneuve with the south shore of the river at Longueuil, Quebec. Named after Lower Canada political reformer Louis-Hippolyte Lafontaine, the Lafontaine Tunnel is an immersed tube structure, measuring 1,391 m (4, 563.6 ft) long. It carries the Autoroute 25 expressway and passes beneath the main shipping channel in the Saint Lawrence River, immediately downstream from the Saint Lawrence Seaway. It surfaces on Île Charron (Îles de Boucherville at Exit 1 of Autoroute 25), then continues by bridge to Longueuil. The bridge-tunnel sees about 120,000 daily crossings, of which 13% are trucks. Construction began in 1963, and opening day was March 11, 1967.

Tunnel data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).