When will you make a faster AI car overtake a car going slower than the faster AI? When on a dual-carriageway, some cars are slower than each other and this causes traffic jams because they don't overtake the car that is going 70 km/h in a 120 km/h zone. On a single-carriageway, there is a car going 60 km/h in a 80 km/h zone. The AI should check the oncoming lane and make sure a car is more than 200 meters away and it is safe to overtake.