The Central Park Medical Unit (CPMU) is an all-volunteer ambulance service that provides completely free emergency medical service to patrons of Central Park and the surrounding streets, in Manhattan, New York City, United States. In addition to its three ambulances, CPMU also operates a rapid-response bike patrol, particularly during major events such as the New York City Marathon, the 1998 Goodwill Games, and concerts in Central Park (like the 2003 Dave Matthews Band Concert). CPMU has also helped the greater New York City community during the 1993 World Trade Center bombing, the September 11, 2001 attacks on the World Trade Center, the American Airlines Flight 587 crash, and the 2003 North America blackout.