Editing Tailgating (section)

===Aerodynamics===
A form of deliberate tailgating known as [[slipstreaming]], "draft-assisted forced stop", or "draft-assisted forced auto stop" (D-FAS) is a technique used by some [[Hypermiling|hypermiler]]s to achieve greater fuel economy. D-FAS involves turning off the engine and gliding in neutral while tailgating a larger vehicle in order to take advantage of the reduced [[Drag (physics)|wind resistance]] in its immediate [[Wake (physics)|wake]].<ref>[https://www.motherjones.com/news/feature/2007/01/king_of_the_hypermilers-4.html motherjones.com] {{webarchive|url=https://web.archive.org/web/20070110041001/https://www.motherjones.com/news/feature/2007/01/king_of_the_hypermilers-4.html |date=2007-01-10 }}</ref> Note that this practice is extremely dangerous: while tailgating itself is inherently risky, the danger of collision is increased with D-FAS as power for [[brake|power brakes]] can be lost after a few applications of the brake pedal and, with older cars, the pressure that causes [[power steering]] to function can be lost as well.<ref>[https://www.motherjones.com/news/feature/2007/01/king_of_the_hypermilers-2.html motherjones.com], King of the hypermilers-2 {{webarchive|url=https://web.archive.org/web/20070109232407/https://www.motherjones.com/news/feature/2007/01/king_of_the_hypermilers-2.html |date=2007-01-09 }}</ref>