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General advice - Clean Driving

Accelerate quickly

Bursts of acceleration cause an overconsumption of fuel. But when you move off at a green light, accelerate quickly in order to reach cruising speed. Indeed, given that a car consumes the least at 70 km/h (45 mph) on average, driving at 30 km/h (20 mph) rather than at 40 km/h (25 mph) pollutes more on average, and likewise when driving at 40 rather than at 50. Therefore it is better to accelerate quickly, but not fully, by pressing down on the accelerator just 3/4 of the way, for it is preferable to pollute a lot initially then drive in fourth gear at 45-50 km/h (30 mph) rather than accelerate slowly and remain in first or second gear, which consume a lot of fuel, for long periods.

Question: If driving at 40 (25 mph) rather than at 50 pollutes more, why did you previously say that it is better to drive at 40 (25) than at 50 (30)?

Answer: It's because while it's better to drive at 60 (38 mph) than at 50 (31 mph), and at 50 (30) than at 40 (25), it has to be at constant speed. It is better to drive at a constant speed of 45 (28 mph) rather than vary one's speed around 50 in jammed-up areas.

Anticipate red lights

Anticipate red lights by going into neutral once you see some less than 200 meters away (those of you who are more cautious would probably step lightly on the brake pedal to warn drivers behind of their deceleration). When in doubt (if you know that there is a light coming up but you can't see it), put your car into neutral at 35-40 km/h. If the light turns out to be green, reaccelerate: there would hardly have been any overconsumption due to this variation in speed. If the light is red, you would have driven for free over a few meters.

Anticipate green lights as well. Has the light been red for a long while? Do you see the red light come on in the next street? The light in yours is probably on the verge of turning green, so maintain your speed if possible so that you can start off quickly once it does turn green.

Red Light

Make use of gravity

Gravity does serve a purpose. If there are "false flats", make use of them: put your car into neutral in anticipation of a light some distance away. If there are jams and traffic flow is (very) slow, make use of gravity to cruise along by virtue of your car's weight (what's the use of going from 0 to 20 km/h then having to brake 10 meters thereafter?).

If you can't make use of gravity, use your engine in an intelligent way

When on level ground, or on a very slight uphill, if you lift the clutch ever so slightly, your car will move, as if by wonder, of its own accord, without you having to accelerate. In traffic jams, remove your foot completely from the accelerator and you will find yourself moving along smoothly without consuming any more than if you were at a standstill.

When the light turns green, start accelerating by simply lifting(?) the clutch and stepping on the accelerator only as much as necessary. If you're going to pollute when you stop, you might as well pollute less when accelerating.

Picture founded on http://www.flickr.com/photos/jordi79bcn/242419963/

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