Does driving speed make THAT much difference?

[Bill D]

2020 high-speed driverless road trip conversation: "Tailgating? No Grandpa, that's the No-Stop Charge Van behind us"

 

[dgpcolorado]

In addition to speed, wind can make a huge difference. Driving into a 20 mph headwind while driving 75 mph is nearly the same as driving 95 mph in calm conditions. And that really saps range. Even a crosswind can lower range significantly. But a tailwind helps, of course.