Road sage

By Duncan Graham-Rowe STEP on the gas if you want to cut your fuel consumption. That’s some of the advice you’ll get from a new dashboard device that tells you how to drive more efficiently. It could reduce your fuel costs by a sixth—and you’ll still get from A to B as quickly as before, say Dutch and Swedish transport experts. People often believe that you have to drive slowly to be fuel-efficient, but that’s not the case, says Mark Dougherty of the School of Transportation and Society in Borlänge, Sweden,
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