A car rental company is a business that provides vehicles for rent for a specific period of time, usually to people who need transportation for a short-term period. These companies have a fleet of vehicles that customers can choose from, ranging from economy cars to luxury vehicles. Car rental companies may operate at airports, train stations, and in city centers, and they often offer a range of services, such as insurance, GPS navigation, and roadside assistance. Some of the most popular car rental companies include Hertz, Enterprise, Avis, Budget, and Alamo.