The fundamental problem is that the EPA tests (and tests in the rest of the world) were really designed to give an estimate of efficiency, not range. For effici

The fundamental problem is that the EPA tests (and tests in the rest of the world) were really designed to give an estimate of efficiency, not range. For efficiency, they are actually pretty reasonable; the MPGe and watt-hours-per-kilometer actually give a reasonably good picture of typical driving, with a mix of high-speed/freeway and stop-n-go/city driving. But the range you care about in a battery EV is more about how much anxiety road trips induce, which is a much more complicated problem, involving variables like high speed charger availability.