Provides highway patrol statewide traffic services and maintains exclusive jurisdiction over the freeways and limited jurisdiction over county roads and streets in unincorporated areas. Officers are responsible for patrolling the highways to enforce traffic laws, issue citations to violators, investigate accidents, provide emergency first aid, assist disabled motorists, prevent or relieve traffic congestion, remove traffic obstructions and perform other services that help to ensure that the highways are safe, convenient to use and accident-free.