Hello. I am studying how to use machine learning to avoid traffic accidents in autonomous driving in GTA V
I have some questions about implementing a traffic simulation in GTA V:

1. How can I define a traffic flow (i.e., control every car) in region of a city?

2. How can I control traffic signals and modify the behavior of a car in response to a traffic signal?

3. How can I control the behavior of pedestrians?

4. How can I define a road map in a city?

I hear that some MODs for GTA V can provide some of the above functions.
I would appreciate if you can tell me what they are.

Actually, I am also looking into implement a MOD myself.
Can you tell me which software tools I should use to hack into GTA V to turn it into a traffic simulator?

Thank you very much for your reply.