This is why cars make you more independent than buses and trams. It'd be a lot harder for the government to close all of the roads than just shutting off public transit.
A lot of the sensitive suburbs (amusing French euphemism) as well as university domains built after 1968 are designed so that entrance and egress can be hindered during riots. A car might not help, depending on where you are.
Yes, it almost makes one think that the post revolutionary French state is only really good at one thing.
Driving a car is pretty miserable in the high density areas these types of riots happen in anyway. As a person who values that kind of independence, I choose to live further out in the country.
Get a bike and you don't have to worry about roads or fuel either.
You should see how the Israeli government blocks off roads from Palestinians in their apartheid state. It's very methodical and cruel, but the government absolutely can do it.
First then come for our weapons..then for our cars...