In a joint dragnet operation, the Colorado State Patrol and the Wyoming Highway Patrol on Sept. 30 placed 16 drivers and 24 vehicles out of service for a variety of violations of Federal Motor Carrier Safety Administration rules. In addition, four arrests were made; Wyoming troopers arrested two commercial vehicle drivers for repeated offenses of driving without a CDL, and one for repeated violations of the ELP rule. Colorado troopers arrested one commercial driver who was subject to a statewide warrant. In addition, one driver received a marijuana citation.