Canada’s busiest trade corridor has shifted north, with the Blue Water Bridge in Sarnia, Ontario, surpassing the Ambassador Bridge in Windsor as the leading commercial crossing between Canada and the United States. This change has been attributed to high tolls at the Ambassador Bridge, which charge up to $27 per axle, compared to the $7 per axle at the Blue Water Bridge. In 2025, the Blue Water Bridge recorded approximately 2.1 million commercial truck trips, compared to around 1.9 million at the Ambassador Bridge. This trend has continued into 2026, with the Blue Water Bridge seeing 531,732 truck trips in the first three months, outpacing the 496,796 trips at the Ambassador Bridge. The toll disparity has redirected supply chains towards Sarnia, complicating the situation for the delayed Gordie Howe International Bridge project, which is currently over budget and behind schedule, exacerbating trade inefficiencies.
Why It Matters
The shift in traffic from the Ambassador Bridge to the Blue Water Bridge highlights the significant impact of toll pricing on commercial logistics and trade routes in North America. Historically, the Ambassador Bridge has been the dominant crossing for decades, illustrating the dramatic change in commercial traffic patterns due to cost factors. The ongoing delays and budget overruns of the Gordie Howe International Bridge, which was designed to alleviate congestion in the Windsor-Detroit corridor, are contributing to economic losses estimated at $7 million per week. This situation underscores the complexities and challenges associated with major infrastructure projects and their role in facilitating international trade.
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