launched its Zipcar for Business program in early 2004 to provide companies with discounts on Monday-Friday driving. Since the launch of the program, Zipcar has signed 10,000 small, medium, and large sized businesses, as companies are increasingly adopting Zipcar's on demand car rental model as a cost-saving alternative for employee travel. Zipcar has partnered with over 600 colleges and universities across North America. Zipcar fleet Zipcar offers more than 50 makes and models of vehicles. Each vehicle has a home location: a reserved parking space located on a street, driveway, or neighborhood parking lot in the member's area, to which it must be returned at the end of the reservation. The locations of all Zipcars and models available at those locations are available at the Zipcar website. Zipcar currently (2019) has a fleet of 12,000+ vehicles. The makes and models of Zipcar vehicles available vary by location (for example, on college campuses, most Zipcar vehicles are economy, hybrid, and full-size cars), though members are able to choose the exact make and model of vehicle they wish from the list of available vehicles online or in the Zipcar smartphone application. Most Zipcar vehicles will feature decals with the Zipcar logo. Each vehicle has a "name" that help the renter to identify their specific vehicle. Zipcar offers vehicles in different categories, such as economy cars, electric vehicles (EV's), hybrid vehicles, full-size cars, luxury vehicles (such as those from Audi, BMW, Mercedes-Benz, and other luxury manufacturers), SUV's, pickup trucks, and cargo vans. A Zipcar vehicle will not unlock for the renter until their exact reservation time. Renters unlock their vehicle (both at the beginning of the reservation and throughout the rental) by either holding their Zipcar membership Radio Frequency Identification RFID card or smartphone against the upper corner of the vehicle's windshield. The vehicle's keys are always tied to the steering column of the vehicle, and stay inside the vehicle at all times. A Zipcar "Copilot" guide is located in the driver's side sun visor, and includes a complimentary refueling card (gasoline card), insurance information, the vehicle registration card, and information about both the vehicle, as well as rental policies and procedures. Embedded technologies Zipcars have RFID readers located on the windshield that communicates with the card to lock and unlock the doors of the vehicle. Each vehicle records hours of usage and mileage, which is uploaded to a central computer via a