EPA's city cycle speed is an average 19.6 mph, highway speed is an average of 48.3 mph. City range weighted at 55% and the highway range at 45%.

I don't think it's that simple. IIRC you don't have to do the city testing.

https://www.epa.gov/greenvehicles/fuel-economy-and-ev-range-...

Regardless, the EPA test cycles have unrealistically low speed profiles.