There are better solutions to this problem than coding cars to behave like bad drivers. Round-a-bouts. Banning left turns during peak hours. Adding a dedicated left turn signal at the beginning of the cycle. The Pittsburg left is a terrible convention... It puts pedestrians at risk (assuming the cross-walk signal follows the traffic signal). And nobody from outside Pittsburg knows it's a thing - if I were visiting Pittsburg, I'd run into the car turning in front of me (well, hopefully not, but it's a risk).