Source: BTS for port of entry data. Truck flows simulated by Matisziw,
T.C. (2005) Modeling Transnational Surface Freight Flow and Border Crossing
Improvement, The Ohio State University.
(Detailed PDF Map)
NAFTA Transborder Truck Flows and Traffic at US Ports of Entry,
NAFTA truck flows are quite revealing of the relationships between
land gateways and their hinterland, which occurs along corridors (NAFTA
corridors). Most of the traffic along the US Mexico border tends to
be of short distance, supplying in finished or semi-finished goods Southern
California, Arizona, New Mexico and Texas. There is also a long distance
corridor reaching the manufacturing belts of the Midwest and the South.
Canadian truck flows illustrate a similar pattern in the Northeast while
Northwest flows are more commodity related.