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Street miles (or minutes) under standard traffic conditions would also seem important for many drivers.

But why would you need a separate number and test for that? It’s guaranteed to be more than the highway range and for the small percentage of the time that range matters at all 99% of the time that will be on a highway. Do people seriously consider driving >200 miles inside of a city in a single day?

It would be useful for people who do not have a home charger, so that they understand if they can do a whole week with it. It is also useful for taxi drivers (though I would hope they do more than just reading a single number).

It is difficult to find a good solution for this, even providing 3 ranges (city, suburban, highway) has its limits and will confuse people.

I don’t think people without a home charger are buying a lot of EVs. The value isn’t there.

But anyway my point is that this combined number is meaningless and unhelpful even in that case. Highway provides a minimum number. Any other test just produces confusion and disappointment.

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