page_title: Hybrid electric vehicle
section_title: Taxis
hierarchical_section_title: Hybrid electric vehicle / Vehicle types / Taxis
caption_attribution_description: English: 2016 Toyota Prius (ZVW50R) Hybrid liftback, SMRT taxis. Pictured in Singapore.
context_page_description: A hybrid electric vehicle is a type of hybrid vehicle that combines a conventional internal combustion engine system with an electric propulsion system. The presence of the electric powertrain is intended to achieve either better fuel economy than a conventional vehicle or better performance. There is a variety of HEV types and the degree to which each function as an electric vehicle also varies. The most common form of HEV is the hybrid electric car, although hybrid electric trucks and buses also exist.
  Modern HEVs make use of efficiency-improving technologies such as regenerative brakes which convert the vehicle's kinetic energy to electric energy, which is stored in a battery or supercapacitor. Some varieties of HEV use an internal combustion engine to turn an electrical generator, which either recharges the vehicle's batteries or directly powers its electric drive motors; this combination is known as a motor–generator. Many HEVs reduce idle emissions by shutting down the engine at idle and restarting it when needed; this is known as a start-stop system.
context_section_description: In 2000, North America's first hybrid electric taxi was put into service in Vancouver, British Columbia, operating a 2001 Toyota Prius which traveled over 332,000 km (206,000 mi) before being retired. In 2015, a taxi driver in Austria claimed to have covered 1,000,000 km (620,000 mi) in his Toyota Prius with the original battery pack.
  Many of the major cities in the world are adding hybrid taxis to their taxicab fleets, led by San Francisco and New York City. By 2009 15% of New York's 13,237 taxis in service are hybrids, the most in any city in North America, and also began retiring its original hybrid fleet after 300,000 and 350,000 miles (480,000 and 560,000 km) per vehicle. Other cities where taxi service is available with hybrid vehicles include Tokyo, London, Sydney, Melbourne, and Rome.
caption: A Toyota Prius hybrid taxi in Singapore.
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