Why does fuel economy get better on the highway, but EV range gets worse?

Question

Why does fuel economy get better on the highway, but EV range gets worse?

In: 463

Answer 1

Presumably a gas/diesel car and an EV are up against the same physics factors on a highway – wind resistance, car going faster and needing more power to sustain that speed, etc. So why does the former get better range than local driving, but the latter considerably worse? Logically both should get better or both should get worse with the same conditions.