Cell Phone Data Exposes Hidden Collapse in Cross-Border Commerce
University of Toronto researchers tracked cell phone location data across 267 U.S. metropolitan areas and found a 42% median decline in Canadian visits during 2025, nearly double the 25% drop reported by Canadian government statistics and more than twice the 17% decline Las Vegas casinos recorded [1]. The discrepancy reveals a measurement problem: traditional border counts and hotel surveys capture official crossings but miss the broader withdrawal of Canadians from American economic life after President Donald Trump imposed a 25% tariff on most Canadian imports.
Karen Chapple, director of the University of Toronto's School of Cities and coauthor of the cell phone analysis, explained that location data captures what border checkpoints cannot, the complete absence of Canadians from shopping districts, restaurants, and business centers that don't require border documentation [1]. When a Montreal family decides to vacation in Quebec instead of Vermont, or a Toronto executive videoconferences instead of flying to Dallas, no official statistic registers the loss. Cell phones do.
Business Travel Vanishes From Banking Centers
Dallas saw a nearly 50% year-over-year drop in Canadian visitors, according to the University of Toronto analysis [1]. That collapse hit hardest in the business travel segment, which represents only 20% of total travel to the U.S. but accounts for 60% of air and lodging revenue, per the U.S. Travel Association [1]. The timing matters: Scotiabank opened a regional headquarters in Dallas in early 2026, joining Royal Bank of Canada, Bank of Montreal, and Canadian Imperial Bank of Commerce, all of which maintain a presence in the city [1]. Yet executives from those institutions stopped making routine visits.
Grand Rapids experienced a 53% decline in Canadian visitors despite naming Vaughan, Ontario as a sister city earlier this year [1]. The Michigan city's close links with Canada's automotive industry made it particularly vulnerable when business travelers, the high-revenue segment, withdrew. Only three of the 267 U.S. cities analyzed saw an increase in Canadian visits [1].
The Center for Economic and Policy Research found that by mid-2025, U.S. establishments with the highest share of Canadians among visitors employed about 6% fewer workers compared to establishments in less exposed markets [1]. That translates to an estimated 14,000 to 42,000 lost jobs in hotels, restaurants, and retail operations that had built staffing models around predictable Canadian traffic [1]. In 2024, Canadian tourism contributed $20.5 billion to the U.S. economy and supported 140,000 American jobs, according to the U.S. Senate Democrats' Joint Economic Committee [1].
The Architecture of Dependency
Border crossings tell part of the story. From January to October 2025, passenger vehicles crossing the U.S.-Canada border declined nearly 20% compared to the same period in 2024 [1]. Some states along the Canadian border experienced declines as large as 27% [1]. New Hampshire saw 30% fewer visitors from Canada in summer 2025 [1].
Elizabeth Guerin, owner of Fiddleheads restaurant in Colebrook, New Hampshire, eight miles from the Canadian border, reported that Canadians normally make up 15% to 25% of her customers but are now extremely rare [1]. Her experience multiplies across border regions where businesses designed their operations around cross-border traffic that evaporated within months of the tariff announcement.
Las Vegas Mayor Shelley Berkley issued a plea to Canadian travelers in September 2024, before the steepest declines materialized [1]. By 2025, the city recorded 1.2 million Canadian tourists compared to 1.4 million in 2024, a 17.4% drop according to the Las Vegas Convention and Visitors Authority [1]. Even that official count understates the withdrawal the cell phone data revealed.
Capital Flows, People Don't
The economic relationship fractured asymmetrically. From January to May 2025, Canadian investors poured $59.9 billion Canadian dollars, $43.3 billion USD, into net purchases of U.S. equities and debt [1]. Money continued flowing south while people stayed home, a pattern that reveals the relationship broke at the human level while remaining intact at the institutional level.
A Politico poll of 2,000 Canadian adults conducted in February found 58% believed the U.S. was not a reliable ally [1]. Nearly 80% said Trump made the relationship between Canada and the U.S. weaker [1]. Those perceptions translated into consumer behavior the cell phone data captured: Canadians withdrew from discretionary travel even as their pension funds and banks maintained U.S. market exposure.
The pattern resembles other single-point-of-failure vulnerabilities in U.S. economic infrastructure, aviation's dependence on the Strait of Hormuz, supply chains built on assumptions of Chinese cooperation. American tourism infrastructure was designed around an unhedged assumption: that political goodwill with Canada, the largest source of international visitors, would remain constant. When Trump's tariffs broke that assumption, the cell phone data revealed what traditional measurements missed, not just fewer border crossings, but a wholesale withdrawal from American economic spaces.
From January to October 2025, the decline in cross-border vehicle traffic approached 20% nationally, with border states experiencing drops up to 27% [1]. Those vehicles carried not just tourists but the routine cross-border commerce that sustained establishments like Guerin's restaurant. The infrastructure built to serve that traffic, hotels, restaurants, retail operations, now operates with excess capacity and reduced staffing, waiting for a diplomatic thaw that would restore traffic patterns both governments had treated as permanent features of the economic landscape.