The types of contact in the PPCS include those initiated by residents, those initiated by police, and resulting from a traffic accident. Resident-initiated contacts include reporting a crime, disturbance, or suspicious activity; reporting a non-crime emergency, such as a medical emergency; reporting a non-emergency, such as asking for directions, custody enforcement, and court orders; participating in a block watch or other anti-crime programs; or approaching or seeking help from police for another reason. Police-initiated contacts include being stopped by police while in a public place or a parked vehicle (i.e., street stop), being stopped by police while driving a motor vehicle (i.e., traffic stop), riding as a passenger in a car that was stopped by police, being arrested, or being stopped or approached by police for some other reason. The PPCS also collected data on contacts resulting from a traffic accident.