TEXAS HIGHWAY PATROL Challenge Coin. This is a beautiful Texas Highway Patrol challenge coin. Coin is about 1 9/16" in diameter and raised lettering on both sides and gold plated with a reeded edge. Reverse side has St. Michael the Protector, Patron Saint of Law Enforcement. Coin is contained in an acrylic air tight holder. The Texas Highway Patrol is a division of the Texas Department of Public Safety and is the largest state-level law enforcement agency in the U.S. state of Texas. The patrol's primary duties are enforcement of state traffic laws and commercial vehicle regulation, but it is a fully empowered police agency with authority to enforce criminal law anywhere in the state. Highway patrol troopers are also responsible for patrolling the state Capitol Complex in Austin and providing security to the governor. The highway patrol was founded in 1929 as the Highway Motor Patrol, the first statewide law enforcement agency in Texas since the establishment of the Texas Rangers in 1823, and the first such force to be uniformed and regularly trained. Since 1935, the agency has operated under its current name. Since its inception with just 60 officers, then known as "inspectors", the Texas Highway Patrol has grown to meet the increasing volume of vehicular traffic on Texas roads, modern security threats, and the requirements of twenty-first century policing.