The display shows the current drivable distance based on the energy remaining in the battery. The amount displayed represents an average based on driving style

The display shows the current drivable distance based on the energy remaining in the battery. The amount displayed represents an average based on driving style, changes in elevation, windspeed, ambient temperature. For example, if the drivable distance indicates 200 miles, and I drive that distance on a level road at 65 mph in still air at 70 degrees F, I can go 200 miles. If I drive it at 85 mph, I'd get about 160 miles. If I drive it at 55 mph, I'd expect 210-220. Up hill into the mountains has a significant decrease, and driving downhill can actually restore energy, depending on the rate of decline and driving speed, thanks to the regenerative braking. I do think the calculation could be more accurate if neural nets were used to learn a specific driver's style, combined with driving destination in the navigation system, ambient temperature, air conditioning drain, etc.