Mariposa Port of Entry

Borderlands is a weekly rundown of developments in the world of United States-Mexico cross-border trucking and trade. This week: Mexico registers a $3 billion trade surplus in November; Wholesum inaugurates a new facility in Mexico; the Nogales port of entry to reopen Sundays; and Shacman Trucks signs distribution agreement.

Around 2,000 trucks a day use State Route 189, and the improvements could save more than 10 minutes per northbound truck, according to the Arizona Department of Transportation.