Part of the U.S. Department of Transportation, the U.S. Bureau of Transportation statistics offers data regarding various transportation topics including: airlines and airports, freight transport, passenger travel, intermodal transportation, and infrastructure. Data is available at varying geographic levels including local, state, national, and international.
Includes:
Border Crossing Data - United States - Mexico : United States - Canada
"NHTSA was established by the Highway Safety Act of 1970 and is dedicated to achieving the highest standards of excellence in motor vehicle and highway safety." NHTSA is part of the U.S. Department of Transportation. Much of the data accessible from this website is provided by the National Center for Statistics and Analysis: "The National Center for Statistics and Analysis (NCSA), an office of the NHTSA, is responsible for providing a wide range of analytical and statistical support to NHTSA and the highway safety community at large." (source: website)
Statistics On-Line Database presents information on transportation and transportation-related activities among Canada, the United States and Mexico, both within individual countries and between the countries.
"Oak Ridge National Laboratory is a national multi-program research and development facility managed by UT-Battelle, LLC for the U.S. Department of Energy...Activities of the Oak Ridge National Laboratory's Center for Transportation Analysis (CTA) include "transportation energy and environmental concerns, safety and security challenges, planning and policy issues, systems engineering, military transportation, and transit visibility." (source: website) The CTA website includes fact sheets, publications, data, statistical analysis, and more.
From The Transport Politic
"In order to improve availability of transportation-related data, The Transport Politic provides interactive charts and tables, updated as frequently as possible, with data documenting trends in U.S. related to travel. Sources and date of last update are noted for each." (source: website)