@t54r4n1 they had a street festival in my neighborhood. The main road was closed for the day. It was amazing, I felt like I could breathe so much deeper and cleaner.
I would personally think it would be easy to replace cars with a system of trams, electric buses and bicycles.
There could also be free electric taxis for people who can't use public transport.
Sunbeam City is a Libertarian Socialist solarpunk instance. It is ran democratically by a cooperative of like-minded individuals.