Sarnia – Port Huron (Blue Water Bridge)

The Blue Water Bridge is the long-haul trucker's crossing of choice between Ontario and the U.S. Midwest. Its twin spans over the St. Clair River tie Highway 402, and through it the 401 corridor from Toronto, directly into Interstates 69 and 94 at Port Huron. Both the U.S. and Canadian border stations run 24 hours a day, according to the bridge operators, which makes the crossing dependable for overnight linehaul schedules. It has long ranked as one of the busiest commercial crossings on the border, and recent reporting shows truck traffic shifting toward Sarnia from the Windsor-Detroit corridor as carriers weigh tolls and congestion.

What brokers should know

• Freeway-to-freeway geometry. The 402 to I-69/I-94 connection avoids city streets entirely, which is a real advantage over crossings that dump trucks into urban traffic.
• Chemical Valley. Sarnia hosts one of Canada's largest petrochemical complexes, generating tanker, hazmat, and specialized freight that needs carriers with the right endorsements and equipment.
• Around-the-clock processing. With both stations open 24 hours, according to the bridge operators, schedule risk concentrates at peak daytime windows rather than gate cutoffs.

As on the rest of the northern border, freight runs direct. There is no transfer-driver system and no routine transloading; carriers pre-file electronic manifests and drive through. See border transfer for how that differs from the Mexican border model, and the Windsor-Detroit page for the corridor's other major option.

Cargado's U.S.-Canada network is emerging, and marketplace activity at Sarnia-Port Huron is growing from an early base. Mexico-Canada freight moving in-bond through the U.S. is live on the network today, and brokers with recurring Ontario-Midwest lanes can post them to help build carrier density on the corridor.