The Jacques Cartier Bridge (French: pont Jacques-Cartier) is a steel truss cantilever bridge crossing the Saint Lawrence River from Montreal Island, Montreal, Quebec, to the south shore at Longueuil, Quebec, Canada.

The bridge crosses Saint Helen's Island in the centre of the river, where offramps allow access to the Parc Jean-Drapeau and La Ronde amusement park.

Originally named the Montreal Harbour Bridge (pont du Havre), it was renamed in 1934[3] to commemorate the 400th anniversary of Jacques Cartier's first voyage up the St. Lawrence River.

In 1961, a second ramp was built on the east side to prevent cars traveling toward Montreal from having to cross the path of those heading toward Longueuil in order to access St. Helen’s Island, a major source of accidents.

[4] A bust of Jacques Cartier[7] is located at the exit leading to Île Sainte-Hélène and was donated by France.

[8] Its imposing steel structure of its main section most likely inspired the designers of J. C. Van Horne Bridge spanning the Restigouche River between Campbellton, New Brunswick and Pointe-à-la-Croix, Quebec.

The toll plaza area now houses the offices of the corporation that owns and operates the structure and the nearby Champlain Bridge.

Another curve in the middle of the bridge at the height of Île Sainte-Hélène is due to the positioning of the pillars.

The pillars were built according to the direction of the stream of the river in a different axis of the streets to the North approach on the island of Montreal.

This deficiency was corrected in the early 2000s by raising the west side of the deck creating a slight tilt making it easier to take the curve.

It continues on the South Shore in a short motorway section of Highway 134, which ends at an interchange with roads 112 and 116, before becoming boulevard Taschereau.

Over the last twenty years, major ongoing renovation programs have been completed, including painting and deck replacement to preserve the integrity of the structure and to ensure a safe passage for users.

Réalisations Inc. Montreal Archived 2017-09-14 at the Wayback Machine is responsible for the idea of using big data as a modulator of the bridge lighting program, as well as the design and production of the custom software and training of on-site operators to bring this concept to life.

[11] Fifty-three types of data pertaining to Montreal, across eleven categories, are tracked to feed the bridge's lighting systems, included but not limited to; weather, traffic, noise and activity on social media.

The bridge is then invaded by luminous movements in the colours of the most discussed topics of the day by the Montreal media: society (red), environment (green), technology (light blue), business (gray), sports (blue), institutions (pink), culture (purple).

More information on how data is interpreted and expressed in light, and the systems used to do so, can be found on the Réalisations Archived 2017-12-22 at the Wayback Machine website.

The first lighting up of the bridge occurred on May 17, 2017, the same day associated with the founding of Montreal in 1642 and officially kicking off the festivities for the 375th anniversary.