WINDSOR, Ontario – It took 26 years and billions of dollars in public investment to build a second crossing over the Detroit River. It took four days for a vehicle carrier hauling finished Stellantis automobiles to warn its drivers to stay off it.
CTV News Windsor reported on July 31 that some drivers for a vehicle carrier transporting finished Stellantis vehicles had received notices warning of disciplinary action for using the new Gordie Howe International Bridge, which opened to commercial and passenger traffic on July 27. The bridge connects Windsor, Ontario, to Detroit, Michigan, the heart of North America’s automotive corridor. The carrier has not publicly explained its reasons, and neither the company nor Stellantis responded to requests for comment.
The directive placed a spotlight on the peculiar economics now governing the Windsor-Detroit crossing. The Gordie Howe Bridge was designed, in part, for the auto industry; its lanes were built to handle oversized commercial loads, and its port of entry was engineered to process vehicle carrier traffic at scale. Yet the carriers hauling the very cars the bridge was built to move appear to be routing around it, at least for now, because tariffs do not care which bridge a truck uses.
The bridge has been 26 years in the making. Jointly owned by a Canadian crown corporation and the state of Michigan, it was conceived specifically to challenge the monopoly of the Ambassador Bridge, a century-old privately owned span controlled by a Detroit family that moves more than a quarter of all trade between the United States and Canada. For decades, the Ambassador Bridge’s owner resisted a second crossing. The opening arrived on July 27, three days after Canada abandoned plans for a joint ceremony with the United States and held a solo dedication on July 24.
Those tariff tensions cast a shadow over every crossing on the corridor. Under a 1930 trade statute invoked by the Trump administration, duties on Canadian automotive goods are running at 50 percent, a rate that, as EH previously reported, overrode USMCA protections that had governed duty-free auto trade for more than three decades. Stellantis assembles the Chrysler Pacifica minivan in Windsor. The components for that vehicle cross the border in both directions, chassis parts moving south and powertrains moving north, before the finished car crosses back into the United States. Each crossing now lands inside a 50 percent tariff regime regardless of which bridge carries the truck.
The truckers themselves have taken a clear-eyed view of the math. CTV News Windsor reported that while commercial drivers welcomed the bridge’s wider lanes and smoother approach roads, they do not expect the efficiency gains to translate into lower consumer prices. Whatever time or fuel a carrier saves on the new crossing gets absorbed by the tariff cost on the cargo. The bridge improves logistics. It does not change the trade calculus.
The discipline notice sent to Stellantis vehicle-carrier drivers adds a harder edge to that calculus. It is a formal operational directive, not an informal suggestion, that drivers avoid a port of entry purpose-built for their cargo type. The most plausible explanation, though neither party has confirmed it, is that uncertainty around customs bonding arrangements and port-of-entry processing procedures at the new facility creates compliance risks that the carrier is not yet willing to absorb. A new port of entry means new CBP protocols, new bonding houses, and new administrative procedures that veteran drivers on the Ambassador Bridge run have not yet been trained to navigate.
That uncertainty has consequences beyond any single carrier. The Windsor-Detroit corridor is the spine of Ontario’s manufacturing belt, the single most exposed stretch of Canadian industry to the current tariff regime. What happens on that corridor in the coming months will do as much to shape the economic relationship between the two countries as any diplomatic statement out of Ottawa or Washington.
The Gordie Howe Bridge took a generation to build. The industry it was designed to serve is operating around it for now, waiting to see whether the trade environment that surrounds it will shift before the bridge’s own customs procedures harden into routine. That depends on how long the 50 percent tariff holds, a question that remains, for now, entirely unanswered.
