Patrols state highways and monitors traffic in assigned area using vehicle equipped with two-way radios and radar, assists motorists, enforces motor vehicle and criminal laws by issuing citations and making arrests, and assists other law enforcement agencies. Directs traffic and controls activities in disaster areas, administers first aid, investigates conditions and causes of accidents, and prepares accident reports. Appears in court as a witness in traffic violations and criminal cases, maintains records, and prepares and submits reports. Maintains equipment, performs preventive maintenance checks on vehicle and other equipment, performs minor maintenance, and delivers equipment to the appropriate shop for repairs. Investigates and apprehends persons suspected of illegal sale or use of narcotics and other crimes. Interviews victims, witnesses, and suspects. Initiates and maintains surveillance, collects evidence and submits to magistrate for warrant, and writes reports. Travels throughout assigned area checking vehicle inspection records, administering examinations to employees, and certifying motor vehicle inspection stations. Visits stations to detect operating violations, investigates complaints, and suspends station operation when necessary. Administers and evaluates polygraph examinations, interrogates suspects to clarify deceptions, and documents results. Administers and grades drivers’ license examinations and maintains files, reports, and examination material. Develops and presents certification training to state police officers and other law enforcement officials. Presents safety programs to schools, civic groups, and the public, and serves as media spokesperson for the state police during crisis events. Performs other duties as assigned.