What are the thoughts on having the car predict range based on the current wind direction/velocity and elevation profile of your navigation route? Aircraft flight plans take winds aloft into the calculations for how much fuel is required and the optimal speed to fly.
Also, cruise control could select it's speed based on headwind/tailwind to optimize cruise speed (within limits).
Also, cruise control could select it's speed based on headwind/tailwind to optimize cruise speed (within limits).