I hate this sentiment so much, because it implies that everyone can just wait for change: "Just go buy another gas powered car until that rail road line is built".
If you can afford an electric car (instead of your current gas powered car) today please buy one or you are part of the problem. If you don‘t need it anymore, because of that rail road line, sell it. Electric cars are much better for the climate & the surroundings. They can also be important for electric grid stability.
Additionally since Copenhagen was mentioned: In the last ten years car ownership in Copenhagen actually increased (https://kk.statistikbank.dk/statbank5a/SelectVarVal/saveselections.asp). Just because people take the bike every day doesn‘t mean that they don‘t own a car.
PS: I live in the city center and don‘t own a car. Never have.