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xkcd #2932: Driving PSA
(imgs.xkcd.com)
Alt text:
This PSA brought to you by several would-be assassins who tried to wave me in front of speeding cars in the last month and who will have to try harder next time.
This goes especially for EVs. Wind resistance really chews up your power budget once you're above 55mph or so. May as well run the heater with the windows down at that point.