The Brownsville & Matamoros International Bridge, also known as B&M International Bridge, Brownsville-Matamoros International Bridge and Express Bridge, is one of three international bridges that cross the U.S.-Mexico border between the cities of Brownsville, Texas, and Matamoros, Tamaulipas. This international bridge unites the Matamoros–Brownsville Metropolitan Area, which counts with a population of 1,136,995, making it the 4th largest metropolitan area in the Mexico-US border. It is popularly called the "old bridge" because its original incarnation, still standing, is the city's oldest international bridge. In 1999, Texas state Historical marker 11778 was placed at the site by the Texas Historical Commission and the Cameron County Historical Commission to recognize the bridge's historical significance. From Wikipedia