Odd as it may sound, dropping your speed can get you home quicker. Mr Eves says various schemes, including computer-controlled speed signs and cars with cruise controls to match their speed to the flow of traffic, have all cut journey times. There are, of course, limits to the theory. In fact set a speed limit any lower than 40mph, says Mr Eves, and motorists will be getting nowhere in a hurry. No change there then.
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