The Miami-Dade Police Department (MDPD), formerly known as the Metro-Dade Police Department (1981–1997), Dade County Public Safety Department (1957–1981) and the Dade County Sheriff's Office (1836–1957) is a Full Service County Police Department serving Miami-Dade County, Florida's unincorporated areas, although they have lenient mutual aid agreements with other incorporated municipalities, most often the City of Miami Police Department. The MDPD has approximately 4,700 employees. The Department is still often referred by its former name, the Metro-Dade Police or simply Metro. Miami-Dade Police officers are easily identified by their taupe/brown colored uniforms. Miami-Dade Police vehicles are identified by their green and white livery. MDPD officers carry silver badges, while officers with the ranks of sergeant and above carry gold badges.