Tennessee Highway Patrol offers patrolling and marijuana eradication services. The department specializes in the enforcement of traffic-related federal and state laws. It intervenes in the cases of accidents that involve property damage, personal injuries and fatalities. It has operations and criminal investigation divisions. Tennessee Highway Patrol also operates a riot squad that responds during emergencies. The department s criminal investigation division provides training and technical support to several law enforcement agencies. It has a commercial vehicle enforcement division that operates nearly five commercial vehicle inspection sites throughout the state. In addition, it specializes in the inspection and weighing of commercial vehicles and driver logs. The department also operates a bomb squad, task force, and aviation and K-9 sections. Tennessee Highway Patrol maintains a location in Cookeville, Tenn.