A busy border does not always mean a healthy trade relationship. At the International Bridge connecting Sault Ste. Marie, Ontario, and Sault Ste. Marie, Michigan, commercial truck crossings fell nearly 16% in September, even as more passenger vehicles used the crossing.
The latest figures from the International Bridge Administration reveal two very different trends. Overall traffic increased modestly from a year earlier, helped by an 8.9% rise in full-fare passenger cars. Commercial trucking, however, continued a decline that has persisted through much of 2026.
The contrast comes as Canada and the United States struggle with tariffs, uncertain supply chains and changing travel habits. For businesses on both sides of the St. Marys River, the numbers raise an important question: why are more people crossing the border while fewer trucks are making the trip?
Commercial Truck Crossings Fell 15.9% in September
The International Bridge Administration recorded 4,254 commercial truck crossings in September 2026, down from 5,060 during the same month in 2025. That represents a decline of 15.9%, or 806 fewer one-way truck crossings. Commercial vehicles accounted for just 5.1% of the bridge’s 83,206 total crossings during the month. The figures cover the Sault Ste. Marie International Bridge specifically, rather than every crossing between Canada and the United States.
That distinction is important because the bridge is a significant northern trade route, even though its commercial volumes are smaller than those of major crossings farther south. Each recorded truck movement represents activity somewhere in a transportation network involving carriers, manufacturers, warehouses and customers. Fewer crossings can signal weaker shipment demand, changing delivery schedules or shifts to other transportation routes. However, the traffic count does not reveal cargo weights, shipment values or the reasons companies made particular transportation decisions.
Passenger Traffic Increased Despite the Commercial Decline
While commercial trucking declined, full-fare passenger car traffic increased 8.9% to 40,750 crossings. That category represented 49% of all bridge traffic in September. Cars pulling trailers also increased, rising 2.5% to 4,279 crossings. The stronger performance helped lift total monthly traffic to 83,206 crossings, an increase of 1,591 vehicles, or 1.9%, compared with September 2025.
Not every category of passenger travel improved. Vehicles using commuter fares recorded 33,923 crossings, down 3% from a year earlier. This difference suggests occasional and regular border travel may be recovering at different speeds, although the bridge’s statistics do not identify why individual motorists crossed. A family taking a weekend trip, a shopper visiting another city and a worker commuting frequently can generate different traffic patterns. The combination of rising full-fare trips and declining commuter-fare traffic is therefore more informative than the overall 1.9% increase alone.
The Apparent Recovery Remains Far Below 2024 Levels
September’s modest improvement looks less reassuring when compared with conditions before the steep decline in cross-border travel during 2025. The International Bridge recorded 109,539 crossings in September 2024, compared with 81,615 in September 2025 and 83,206 in September 2026. Despite this year’s improvement, total monthly traffic remains approximately 24% below its September 2024 level. The latest increase therefore represents a partial recovery from a substantially weakened comparison period.
The same pattern appears in the year-to-date figures. By September 30, the bridge had recorded 657,204 crossings in 2026, approximately 1.5% more than the 647,831 registered during the first nine months of 2025. However, that total remains nearly 23% below the 849,624 crossings recorded over the corresponding period in 2024. For a retailer or restaurant relying on cross-border customers, a small percentage increase may be encouraging without restoring previous business volumes. The numbers show stabilization, but not a complete return to earlier travel patterns.
Trucking Weakness Has Continued for Several Months
September was not an isolated setback for commercial transportation. Truck crossings at the Sault Ste. Marie bridge declined 16.7% in August compared with the previous year, according to reporting based on International Bridge Administration data. July had already recorded a 15.9% decrease. The recurring weakness suggests businesses and freight carriers have faced a prolonged adjustment rather than a temporary slowdown confined to one month.
The cumulative figures reinforce that concern. During the first eight months of 2026, commercial trucks made 36,716 crossings, compared with 42,365 during the equivalent period in 2025. That represents a decrease of approximately 13.3%. Adding September’s totals brings the first nine months of 2026 to approximately 40,970 truck crossings, compared with 47,425 a year earlier. These figures cannot establish whether fewer goods were shipped overall, because load sizes and routes may have changed. They do demonstrate that the bridge is handling substantially fewer commercial vehicle movements even while its passenger traffic shows signs of recovery.
U.S. Tariffs Are a Concern, but Their Impact Is Not Proven
The decline comes during another difficult period in Canada–U.S. trade relations. Washington imposed 50% tariffs on approximately C$27.6 billion worth of selected Canadian goods beginning August 22, 2026, under Section 338 of U.S. trade law. Canada responded September 8 with counter-tariffs of 15%, 25% and 50% on specified American products, including goods in the steel, dairy, appliance, agricultural equipment, pulp and paper, and electronics sectors. Such measures can increase costs and complicate cross-border purchasing decisions.
Nevertheless, a direct connection between those tariffs and the bridge’s declining truck traffic has not been established. Michigan Department of Transportation spokesperson Dan Weingarten told The Sault News that officials do not track why individual motorists or carriers cross, making it impossible to assign specific causes from traffic counts alone. The trucking decline also predates September’s Canadian countermeasures. Changes in demand, shipment consolidation and transportation routing could all contribute. Tariffs remain a plausible source of pressure, but the available evidence does not support treating them as the sole explanation.
The Northern Ontario Crossing Serves a Larger Industrial Network
The Sault Ste. Marie International Bridge connects Ontario’s Highway 17 corridor with Michigan’s Interstate 75 transportation network. It is the only vehicle crossing between Ontario and Michigan within roughly 300 miles, making it an important gateway for northern communities and companies moving goods between northeastern Ontario, Quebec and the Upper Great Lakes states. According to the bridge administration, approximately $2.4 billion in cross-border trade passed through the crossing in 2022.
Its economic role extends beyond local deliveries. The bridge authority identifies steel, paper and forest products among the industries served by the route, alongside tourism, shopping and work-related travel. Manufacturers and distributors often depend on predictable transportation arrangements to coordinate supplies and customer deliveries. A reduction in commercial crossings does not necessarily mean factories have cut output, but it can prompt questions about the flow of business through the region. For northern Ontario companies, changing trade conditions may be especially challenging when alternative border routes involve substantial additional travel.
National Travel Figures Show Canadians Are Returning Slowly
The broader picture of Canadian travel is improving, although the recovery remains incomplete. Statistics Canada’s preliminary September 2026 figures show Canadian residents’ automobile return trips from the United States increased 5.6% compared with September 2025. However, those trips remained 31.1% below September 2024 levels. August showed a similar pattern, with Canadian automobile return trips rising 9.9% year over year while remaining 27.4% below August 2024.
American travel into Canada has strengthened as well. U.S. residents made approximately 1.3 million automobile trips into Canada in September, an increase of 19.5% from a year earlier. Statistics Canada cautioned that the timing of the Labour Day weekend contributed to the sharp September increase. These are national travel figures, not measurements specific to Sault Ste. Marie, and their counting methods differ from the bridge’s vehicle records. They nevertheless help explain how recreational travel can recover from a difficult year without indicating that cross-border commerce has returned to its former pace.
Border Communities Are Experiencing Mixed Economic Signals
Businesses in Michigan’s Sault Ste. Marie have expressed concern about changing border activity. Sault Area Chamber of Commerce executive director Tony Haller told The Sault News that several weeks of warm, sunny weather had been beneficial for tourism and local businesses. He also acknowledged that chamber members were not reporting a complete return to conditions before the trade dispute. The contrast is visible in the September data: passenger cars are returning in greater numbers, while commercial transportation remains depressed.
The economic consequences may extend well beyond transportation companies. In September, Michigan Public reported that the International Bridge Administration estimated businesses on the Michigan side were missing out on approximately US$62.7 million in spending because of reduced border traffic. The calculation relied on Canadian government per-trip spending estimates, rather than independently verified losses at individual businesses. It nevertheless illustrates the scale of concern surrounding fewer visitors. Restaurants, shops and service providers depend on customer spending that cannot always be replaced by domestic demand.
Fewer Commercial Trucks Can Affect Bridge Toll Revenue
The bridge itself relies on toll collections to fund operations and maintenance. Those costs include the bridge structure, toll plaza, maintenance facilities and associated buildings. Commercial vehicles are especially important because their tolls are generally higher than those charged to passenger cars. Under rates effective October 1, 2026, a standard passenger vehicle pays US$4.70 or C$6.50, while a five-axle commercial truck pays US$33.75 or C$46.75.
Historical financial information shows why truck volumes deserve attention. In a 2019 announcement, bridge officials said commercial traffic represented approximately 7% of crossings but generated about 36% of toll revenue. Those percentages describe the earlier period and should not be assumed to reflect the exact 2026 revenue mix. Still, they demonstrate how a relatively small share of vehicles can provide an important portion of operating income. Rising passenger traffic might help offset some commercial weakness, but it does not automatically replace the revenue associated with hundreds of missing truck crossings.
Windsor–Detroit Traffic Shows Why the Numbers Need Context
The decline in Sault Ste. Marie should not be confused with a uniform collapse in trucking across the Ontario–Michigan border. Farther south, the Gordie Howe International Bridge opened between Windsor and Detroit on July 27, 2026. Statistics Canada recorded 34,800 commercial trucks entering Canada through the new crossing in August, its first full month of operation. Meanwhile, commercial truck entries at Windsor’s other ports, including the Ambassador Bridge and Windsor–Detroit Tunnel, increased 0.4% from August 2025 to approximately 87,400.
Those figures show how traffic patterns can differ dramatically from one crossing to another. The new bridge also changes the number of available routes in the Windsor–Detroit area, making comparisons between individual crossings more complicated. Statistics Canada counts vehicles entering Canada in those figures, while the Sault bridge authority reports one-way crossings in both directions, so the totals should not be treated as directly equivalent. U.S. transportation data also identifies Detroit, Port Huron and Buffalo as leading truck freight gateways. The 15.9% decline is a significant local warning, not proof that all Canada–U.S. trucking has fallen by the same amount.
The Next Traffic Reports Will Show Whether the Divide Persists
The coming months will help determine whether September represents a temporary imbalance or the continuation of a more serious commercial slowdown. October and November figures will be useful for assessing whether truck crossings recover after several months of double-digit declines. Passenger totals will also deserve attention, particularly whether full-fare travel remains stronger while commuter activity continues to lag. Comparisons with 2024, rather than only the depressed levels of 2025, will provide a clearer picture of recovery.
The bridge administration is also preparing a symbolic reminder of the connection between the two communities. On October 31, the anniversary of the bridge’s opening in 1962, passenger tolls will temporarily return to US$1.50 or C$2 for 24 hours. The promotion may encourage additional visits, but it cannot resolve commercial tariffs or supply-chain uncertainty. For northern Ontario and Michigan, the deeper question is whether improving passenger movement will eventually be matched by stronger trade. Until then, the bridge’s traffic figures tell two stories: people are gradually returning, while freight movement is still struggling.
