How many certificates of standards and provisional operating authority registrations were issued to Mexican domiciled motor carriers in the NAFTA pilot program?

The correct answer is 13. This number reflects the specific count of certificates of standards and provisional operating authority registrations that were issued to Mexican domiciled motor carriers during the NAFTA pilot program. Understanding this figure is essential in grasping the scale of international trucking operations initiated under NAFTA, which aimed to gradually open the U.S. market to Mexican trucks.

This figure indicates the level of compliance and readiness of certain Mexican motor carriers to operate within the U.S., according to the standards set forth in the agreement. The issuance of these certificates was significant for facilitating cross-border trade and enhancing the movement of goods while also ensuring regulatory compliance and safety in transportation.