How to make the Ai Cars?

Hello, I'm new in this forum :D

I want to ask some question.
How to make the AI Cars? Not like Opponent in race car game, but in Gta game.
What i've done is:

1. Every random(x, xx) Spawner -> Spawn Car
2. Make the car can stop on traffic car if the lamp is red
3. Make the car turn sometimes

Well, i need this one:
> Make the Car stop when certain distance
> When the car in front of him walked, then he walked again.

I have tried several ways but it still not working. Thanks for Reply and Reading.

Sorry if my english Bad. I'm from Indonesian :D

Can you post your .capx file? It will be easier for people to see what you have.

(You can do that through using Dropbox)

@PaletteRider
Here is the link, https://www.dropbox.com/s/k4d6kt1chof4ckd/Pemulung.capx.

The game has not been perfect. Thanks for help!

@PaletteRider
Here is the link, .

The game has not been perfect. Thanks for help!

your link has died. please upload again. I want it. thank you