Toyota
Since August 2010, a warning device for retrofitting the
Toyota Prius is available for Japanese consumers.
Toyota Motor Company teamed up with
Fujitsu Ten to develop an automatic warning system for hybrids and electric vehicles to alert pedestrians when the car is propelled by its electric motor. The companies also studied the development of a system that would change the alarm's tune and volume with the assistance of an obstacle-detection radar.
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On August 2010 Toyota began sales of an onboard device designed to automatically emit a synthesized sound of an electric motor when the
Prius is operating as an
electric vehicle at speeds up to approximately 25 kilometres per hour (16 mph). The device will be available in Japan through authorized Toyota dealers and Toyota genuine parts & accessories distributors for retrofitting on the third-generation Prius at a price of ¥12,600 (~US$150) including the consumption tax. The alert sound rises and falls in pitch according to the vehicle's speed, thus helping indicate the vehicle's proximity and movement to nearby pedestrians. Toyota is planning to use other versions of the device for use in
gasoline-electric hybrids,
plug-in hybrids,
electric vehicles as well as
fuel-cell hybrid vehicles planned for
mass production. The device meets the 2010 government regulations issued for hybrid and other near-silent vehicles.
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Toyota's Vehicle Proximity Notification System (VPNS) was introduced in the United States in all 2012
model year Prius family vehicles, including the
Prius v,
Prius Plug-in Hybrid and the standard Prius. The system is being introduced to comply with the Pedestrian Safety Enhancement Act of 2010.
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