driving speed

Energy-efficient driving techniques are used by drivers who wish to reduce their fuel consumption, and thus maximize fuel efficiency. Many drivers have the potential to improve their fuel efficiency significantly. Simple things such as keeping tires properly inflated, having a vehicle well-maintained and avoiding idling can dramatically improve fuel efficiency. Careful use of acceleration and deceleration and especially limiting use of high speeds helps efficiency. The use of multiple such techniques is called "hypermiling".
While these techniques can be applied by any driver, energy-efficient driving (often called "eco-driving") has become a major focus of modern fleet management. As a key part of fleet digitalization, companies use telematics to automatically monitor and manage fuel economy. A fleet telematics system collects data on behaviors that waste fuel, such as harsh acceleration, speeding, and idling. This information is then used in driver scoring applications to identify and coach drivers. This is often combined with dedicated fuel-management systems that use high-precision fuel level sensors to get exact fuel consumption data and prevent gasoline theft.
Simple fuel-efficiency techniques can result in reduction in fuel consumption without resorting to radical fuel-saving techniques that can be unlawful and dangerous, such as tailgating larger vehicles.

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