The North American Free Trade Agreement (NAFTA) was signed in 1992 and went into effect in 1994. Mexican trucks were to be given access to California, Arizona, New Mexico, and Texas in December of 1995. In 2001, a NAFTA dispute resolution panel ruled that the United States was violating its NAFTA obligations by adopting a blanket ban on trucks from Mexico. Mexico announced, effective March 19, 2009, tariff increases ranging between 10% and 45% on 90 products whose imports from the U.S. were subject to a punitive tariff.”]
Source: https://www.csoonline.com/article/2125889/mexican-trucking–tariffs–security-and-safety.html