Source: Bureau of Transport Statistics, North American Trade and Travel Trends, BTS01-07.
Modal Shares of U.S.-NAFTA-Partner Merchandise Trade, 2000
North American trade, especially in terms of value, is dominantly relying on trucking, which takes place along several north / south road corridors and which concerns several major points of entry along the American, Canadian and Mexican borders. They have become bottlenecks in North American trade