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Bridge Up tracks St. Lawrence Seaway lift bridges in real time: every monitored crossing on the Welland Canal in St. Catharines and Port Colborne, plus the Montréal-area bridges on the South Shore and Beauharnois canals near Salaberry-de-Valleyfield.
Tap a marker for live status, or browse the region and per-bridge pages for typical closure durations, traffic tips, and history.
St. Catharines sits where the Welland Canal meets Lake Ontario, and the canal cuts straight through the city, so a lot of everyday driving here means crossing it. Five of the canal's lift and bascule bridges are in and around town, from Lakeshore Road at Port Weller down to the Highway 20 bridge at Allanburg. Each one stops road traffic when a Seaway ship comes through, and on a busy day the waits add up. Below is the live status of all five, plus how long each one usually stays down.
Port Colborne is the Lake Erie end of the Welland Canal, where ships finish the run down from Lake Ontario. Three movable bridges carry traffic across the canal here: Main Street and Mellanby Avenue near Lock 8, and the Clarence Street lift bridge closer to the lake. When a freighter is passing, the bridge goes up and the only options are to wait or find another crossing. The live status and typical closure time for all three are below.
On Montréal's South Shore, the St. Lawrence Seaway runs between the island and the mainland, and the crossings open to let ships through. Bridge Up tracks the movable spans here: the Victoria Bridge linking Montréal to Saint-Lambert, and the Sainte-Catherine bridge by the RécréoParc. A Seaway closure can hold up a commute with little warning, so it pays to check before you head out. Below is the live status and how long each crossing usually stays closed.
West of Montréal, in the Suroît, the St. Lawrence Seaway runs through the Beauharnois Canal past Salaberry-de-Valleyfield and Beauharnois. Two vertical-lift bridges carry traffic across it: the Larocque Bridge at Salaberry-de-Valleyfield, and the Saint-Louis-de-Gonzague bridge a little upstream. Both raise their centre spans for passing ships, closing the road for a stretch each time. Here's the live status and the typical closure time for each.
Every marker updates in real time over a live connection to the Bridge Up service, which watches the St. Lawrence Seaway's official bridge status pages around the clock. Green means the bridge is open to traffic, red means it's closed for a ship, and yellow means a closure is starting or ending.
The typical closure times on the cards are averages from Bridge Up's own log of past closures at each crossing, refreshed daily. Each bridge's page breaks that history down further — including how often closures run short or long — and shows a live estimate of when a closed bridge should reopen.
When a bridge closes, the map also shows the ship responsible: vessel positions come straight from AIS transponders, so you can watch the freighter approach before the barriers drop. The free iOS app adds alerts for the crossings you choose, home-screen widgets, and CarPlay.