Driving with little following distance to the truck in front of you may seem dangerous today, but in the future, it will likely be just the opposite. Thanks to a new wave of technology intended to make trucks safer—such as radar, cameras and reflective light scanning—pairs of trucks will soon be driving on the road at a distance that before would not have been possible. So why is this a good thing? Because air flows more smoothly when one truck is tucked behind another, saving fuel and money.