A police motorcycle is a motorcycle used by various police forces and departments. They may be custom designed to meet the requirements unique of a particular use. A police motorcycle is often called a "motor" by police officers in the United States. Similarly, motorcycle units are known as "motor units" and motorcycle officers are known as motor officers. The maneuverability of the motorcycle on crowded streets offer advantages not provided by larger, more traditional police vehicles. The motorcycle's relatively small size allows it to get to accident scenes more quickly when incidents such as traffic collisions slow down access by four-wheel vehicles. Police motorcycles are also used in police funerals, VIP motorcades, and other special events. Harley-Davidson has maintained a long relationship with police departments and law-enforcement agencies in some countries. For the 2009 model year, Harley-Davidson offers the FLHTP Electra Glide, the FLHP Road King, the XL883 Sportster and the new XB12XP Buell Ulysses Police motorcycle. The FLHTP Electra Glide and the FLHP Road King are also offered as Fire/Rescue motorcycles