Fully autonomous vehicles, also known as driverless cars, already exist in prototype (such as the Google driverless car), and are expected to be commercially available around 2020.According to urban designer and futurist Michael E.
Arth, driverless electric vehicles?in conjunction with the increased use of virtual reality for work, travel, and pleasure?could reduce the world's 800 million vehicles to a fraction of that number within a few decades.59 This would be possible if almost all private cars requiring drivers, which are not in use and parked 90% of the time, would be traded for public self-driving taxis that would be in near constant use.This would also allow for getting the appropriate vehicle for the particular need?a bus could come for a group of people, a limousine could come for a special night out, and a Segway could come for a short trip down the street for one person. Children could be chauffeured in supervised safety, DUIs would no longer exist, and 41,000 lives could be saved each year in the US alone.6061Å¹rÃ³dÅ‚o: https://en.wikipedia.org/wiki/Autonomous_car
The hybrid vehicle typically achieves greater fuel economy and lower emissions than conventional internal combustion engine vehicles (ICEVs), resulting in fewer emissions being generated.These savings are primarily achieved by three elements of a typical hybrid design: Relying on both the engine and the electric motors for peak power needs, resulting in a smaller engine size more for average usage rather than peak power usage.
This regenerative braking reduces vehicle speed by converting some of its kinetic energy into electricity, depending upon the power rating of the motor/generator; Other techniques that are not necessarily 'hybrid' features, but that are frequently found on hybrid vehicles include: Using Atkinson cycle engines instead of Otto cycle engines for improved fuel economy. Shutting down the engine during traffic stops or while coasting or during other idle periods. Improving aerodynamics; (part of the reason that SUVs get such bad fuel economy is the drag on the car.A box shaped car or truck has to exert more force to move through the air causing more stress on the engine making it work harder). Improving the shape and aerodynamics of a car is a good way to help better the fuel economy and also improve vehicle handling at the same time. Using low rolling resistance tires (tires were often made to give a quiet, smooth ride, high grip, etc., but efficiency was a lower priority). Tires cause mechanical drag, once again making the engine work harder, consuming more fuel.
For continuous high speed highway use these features are much less useful in reducing emissions. Å¹rÃ³dÅ‚o: https://en.wikipedia.org/wiki/Hybrid_vehicle#Environmental_issues.