For years, employees with El Paso’s transit system, Sun Metro, could only wonder how many of their riders use the Paso del Norte point of entry bridge connecting El Paso, Texas, and Ciudad Juarez, Chihuahua. Individuals are first admitted through the customs process, and then they walk the few blocks to Sun Metro’s main transit station (called the Downtown Transfer Center) and connect with a bus destined for another part of the city. Until now, Sun Metro could only guess how many of their riders came from Mexico.