Mexico Federal Toll Road 15
1985 specification highway marker.
Near the Mex. 15D split just south of Nogales. As the sign says, one branch goes to downtown Nogales (and the border crossing near where I-19 begins), while the other heads out west to what is called Nogales III on the Mexican side and Mariposa on the US side. The Mexican immigration and Customs station is actually a substantial distance south of the border and the length of the Mex. 15D expressway between the border and the border station is a closed "corredor fiscal," with high chain-link fences designed to prevent entry and exit. The fences do not stop trinket sellers, however.
Photo by J. N. Winkler, 1/2003.