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I have noticed a protruding ridge on the A pillars of some modern cars.
I think the approach is an attempt to channel air towards the roof rather than flowing over the A pillars towards the side windows. At least the high pressure zone over the windshield should be deeper this way allowing for a smoother airflow over the hood and windshield.
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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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