I have been looking at power poles when walking the dog. She walks slow so i have plenty of time. Never really thought about it before but a 120000 volt line means divide the amps by 1000 that are carried on the 120 v lines. If a home draws 100 amps on each leg its only .2 amps on the main line. Maybe it is possible someday with different solid state batteries and higher voltage to make evs workable for more people. A 4800kw charge rate at 240v means 20 amps on the main line at 1000:1. The main lines can have higher voltages than that. I think in my example a 120 kwhr car battery could be charged in 1.5 minutes. I dont know if the numbers are right just doing them in my head. I‘m tired its night time, and the dog wants to go out and do her business. This Fazebook telling strangers mundane things is great isnt it.
120,000 volt lines (usually closer to 115,000 volts) are transmission lines.
What you have feeding the transformer that your house is connected to is a distribution line. These are most commonly 7.2kV, but higher and lower voltages are also used.
In between the 115kV (in some places these may be 230kV) transmission line and the 7.2kV distribution line is your substation.
A video that explains this: