Federal Highway 2 (Carretera Federal 2) runs along the Mexico–United States border. Both segments of Highway 2 are located entirely within the "Hassle Free Zone", which is the zone where a temporary import permit is not required for foreign vehicles. Tourist cards are only required to be obtained by tourists on Highway 2 between Sonoyta, Sonora, and Cananea, Sonora. The rest of Highway 2 can be traveled without obtaining a tourist card as long as the stay doesn't last longer than 72 consecutive hours.