Many state police agencies in the United States take the name of "highway patrol" rather than "state police". State police agencies may fulfil the role of highway patrol, and vice versa. For instance, the Arizona Highway Patrol is actually a state police agency, meaning that it is a police body having statewide authority to conduct law enforcement activities and criminal investigations. In addition to its highway patrol duties, it performs functions outside the normal purview of the city police or the county sheriff, such as enforcing traffic laws on state highways and interstate expressways, overseeing the security of the state capitol complex and other state buildings, protecting the governor, providing technological and scientific support services, and helping to coordinate multi-jurisdictional task force activity in serious or complex cases. The California Highway Patrol serves as bailiffs and courtroom deputies for certain state courts, such as the appellate courts and the California Supreme Court building in San Francisco. The state traffic enforcement agency retained the name "California Highway Patrol" after the merger of the smaller California State Police with the larger — and better-known — CHP and the combination of their functions into one agency.