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The draft wake of a semi extends much further than just 25 feet. I can see the effect at 50 meters, my usual drafing distance.
Ever stood close to a road on a windless day when a semi passes at speed?
You can feel the wake wind blow for 3 or 4 seconds after the semi went by.
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2011 Honda Insight + HID, LEDs, tiny PV panel, extra brake pad return springs, neutral wheel alignment, 44/42 PSI (air), PHEV light (inop), tightened wheel nut.
  lifetime FE over 0.2 Gmeter or 0.13 Mmile.
For confirmation go to people just like you.
For education go to people unlike yourself.
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