Most (if not all) highway patrol/state police agencies have their own website where there are loads of information. You can also walk into their station and ask for a pamphlet of general information
Highway patrol officers are members of a highway patrol unit. The highway patrol is a state agency or a separate unit within a police department designated to patrol and police the highway systems.
Mississippi Highway Patrol was created in 1938.
A popular place to check the arrest reports of the Missouri Highway Patrol would be on the website for the Missouri Highway Patrol. The website contains information on everyone that had gotten arrest and the number of times they had got arrested.
Oklahoma Highway Patrol was created in 1937.
Wyoming Highway Patrol was created in 1933.
California Highway Patrol was created in 1929.
Tennessee Highway Patrol was created in 1929.
Nevada Highway Patrol was created in 1908.
Montana Highway Patrol was created in 1935.
Florida Highway Patrol was created in 1939.
Kansas Highway Patrol was created in 1937.
Utah Highway Patrol was created in 1923.