From le text:
Border cities like Ciudad Juaréz, Mexico, and El Paso, Texas, illustrate different city patterns side-by-side, suggesting cultural influences on the development and growth of cities and infrastructure. Ciudad Juaréz supports at least 1,300,000 people. On the U.S. side of the Rio Grande, El Paso is marked by the brightly-lit Interstate Highway I-10 that cuts across the city. Although the area of El Paso, with an estimated population of slightly more than 600,000 is roughly on the order of the area of built-up Ciudad Juaréz, the density of settlement evidenced by the distribution of lights is much less.Taken April 7, 2003.