United Nations Environment Programme

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Tool 8: Eco-driving:

ecodrivingEco-driving refers to a driving style characterised by lower speeds, less acceleration and "thinking ahead" in traffic. The influence on emissions and fuel economy of speed and driver behaviour is significant. With improved driver behaviour, there are great safety benefits, and indeed, the average speed usually increases. Better driving also saves on maintenance costs such as those for brakes, clutches and vehicle suspension.

Photo: Willy Raimund

Training courses in Eco-driving help the driver to reduce fuel consumption by 5-20%. A 20% reduction is usually achieved directly after the training course; after more time, drivers usually return partially to their previous driving style, which reduces these benefits. However, long-term measurements of Eco-driving indicate that drivers that have completed these courses usually have a 5-10% improvement, compared with before the course. Larger fuel consumption reductions ( up to 10-15%) have been measured in countries such as Sweden and Switzerland.


What is Eco-driving? The most substantial fuel wastes occur with aggressive driving. Time studies show that fast starts, weaving in and out of traffic, and accelerating to and from traffic signals do not save much time, and moreover, waste fuel and quickly wear out car components such as brakes and tires.


General tips

  • Start slowly, avoiding rapid acceleration.
  • Gear-up, use the highest gear possible, and lower the engine speed.
  • Aim to maintain a constant speed – pumping the accelerator sends more fuel to the engine.
  • Anticipate traffic conditions, and accelerate and decelerate smoothly – it is safer, uses less gas, and reduces brake wear.
  • Drive at posted speed limits. Use cruise control on the highway.

For more information on Eco-driving, how to measure fuel consumption, and giving feedback to drivers, please check www.ecodrive.org


Monitoring and On Board Diagnostics (OBD): If driver behaviour is monitored by an on-board computer and fuel-saving behaviour is rewarded, the long-term effects will be greater. The following Eco-driving function indicates the expected fuel savings from practicing Eco-driving in conjunction with monitoring. The Actions-drivers sheet in the Inventory and Options (Tool 18) can give you an indication on how much you can save.

On Board Diagnostics (OBD) systems are compulsory on most vehicles in the US and Euro since mid-1990's. An OBD system checks vital engine functions, such as oil filters and ignition systems, and emission levels of the engine. The most feature you normally see as a driver of the on board diagnostic system is the "check engine" lamp. An OBD system enables you to also, with some extra equipment in most cases monitor fuel economy and driving patterns in an on board computer.

For more info on OBD >> www.obdii.com