The Bureau of Transportation Statistics (BTS) provides incoming annual and monthly border crossing/entry data for vehicles, containers, passengers and pedestrians. The data is provided to BTS by the U.S. Department of Homeland Security - Customs and Border Protection and is available since 1994.
For other U.S.-Mexican border crossing data, visit the Federal Highway Administration's Gateway and Borders and Texas Center for Border Economic and Enterprise Development , which collect northbound and southbound crossing data from bridge operators and the Mexican government. Additionally, incoming border wait times at the port facility level are available from the U.S. Department of Homeland Security - Customs and Border Protection.
More detailed information about border crossing/entry data (e.g. geography, data source, data elements, release schedule and other topics) can be found in Help.