Tariff Whiplash Disrupts Cross-Border Trucking

Truck traffic at North America’s two major land borders showed mixed results in July, with U.S.-bound crossings from Mexico virtually unchanged while southbound Canadian entries fell to their lowest July level in 15 years. The data arrives as tariff changes create uncertainty for shippers and could disrupt equipment and freight flows between the United States and Canada.

July truck volumes point to uneven border activity

July’s record cross-border freight value suggests strong trade activity at first glance, but truck counts and tonnage indicate a more complicated picture. Crossings from Mexico into the United States were nearly unchanged, while the decline in Canadian southbound truck entries points to weaker freight movement along that border.

The latest available data ends in July, meaning it does not yet reflect the full impact of additional tariff measures scheduled to take effect in September. Shippers may accelerate freight movements before the changes begin, potentially producing a short-term surge followed by softer volumes.

Tariffs add pressure to Canadian freight flows

New U.S. tariffs of up to 50% on roughly $20 billion worth of Canadian goods are raising costs for products moving across the border. Vehicles and parts are among the affected goods, with medium- and heavy-duty trucks built in Ontario, including Ford F-Series and Chevrolet Silverado models, remaining a point of disagreement in stalled trade negotiations.

Additional Canadian tariff measures ranging from 15% to 50% are scheduled to take effect Sept. 8. That deadline gives companies a limited window to expedite U.S. exports into Canada before the higher costs apply.

Logistics providers expect cross-border trucking demand to remain elevated ahead of the deadline. Some companies may also seek additional warehouse space to hold accelerated inventory shipments, depending on their ability to finance and manage larger stockpiles.

Equipment imbalance could follow trade shifts

The changes in freight direction could create an unusual equipment challenge for cross-border carriers. A decline in Canadian exports to the United States would reduce southbound freight opportunities and could leave tractors, trailers and containers out of position for the next load.

That imbalance may increase repositioning costs and make it more difficult for carriers to match equipment with available freight. The impact could be most visible on lanes where trade flows are already uneven or where cross-border equipment is difficult to redeploy.

Rates remain elevated in tight markets

Freight rates have stabilized at a higher base even without a broad acceleration in demand. Capacity remains tight in markets with the greatest driver shortages, including Laredo, Texas, where load-to-truck ratios remain elevated.

For carriers and shippers, the combination of tariff deadlines, rushed inventory movements and uneven border volumes is likely to keep cross-border planning difficult in the weeks ahead. The longer-term effect will depend on whether trade negotiations reduce the tariffs or businesses adjust their supply chains to account for higher costs.