Arlington County Police Department Police arrested people for violating Virginia's segregation laws. In 1963, the agency assumed its present name. In September 2001, the Arlington County P.D. responded to the Pentagon after terrorists attacked it during the September 11 attacks, as the building is located in the county. Since the establishment of the Arlington County Police Department, 7 officers have died in the line of duty, the most recent in 2016 as a result of an illness caused by the September 11 attacks of 2001. The Chief of Police as of August 2017 is M. Jay Farr. He was appointed by the County Manager
Streets and highways of Arlington County, Virginia therefore, most roads are unnumbered. This status originated due to the existence of county highway departments in Arlington prior to the creation of the state transportation agency which is now the VDOT in 1927, and the assumption of local roads control by that agency in 1932. The control of the roads system is considered a powerful advantage for community urban planners, who can require developers to contribute to funding needed for road needs serving their projects. Although the streets of Arlington County are not laid out on a grid plan, its local streets follow the Arlington County, Virginia, street-naming system: