For most of its history, it was possible to freely cross the border via Roxham Road, since it largely carried local traffic. Canada established a small customs station just north of the border; the U.S. never followed suit, leaving Roxham an uncontrolled border crossing, even after Canada closed its customs station in the 1950s. That ended when Canadian authorities decided, out of concerns that the terrorist killings at the 1972 Munich Olympics could also occur at the upcoming 1976 Summer Olympics in Montreal, roughly north of the border, to barricade all the uncontrolled land border crossings between Quebec and New York, as well as the neighboring U.S. state of Vermont. Since then Roxham has officially been a dead end in both directions at the border.