The New Hampshire State Police is a state police agency within the Department of Safety of the U.S. state of New Hampshire. Police employees of the State Police are ex officio constables and have the primary role of patrolling the state highways, enforcing the laws and regulations of the highway and motor vehicles, providing law enforcement for municipalities with no or part time coverage, and regulations relating to the transportation of hazardous materials. The jurisdiction of the State Police is generally throughout the state of New Hampshire (although see the caveat below with regard to towns of more than 3,000 or any city).