Sounds like they never heard of Goodhart's law. They rigged a system which measures behavior (distance of approaching vehicle) and tied it to decision making (

Sounds like they never heard of Goodhart's law. They rigged a system which measures behavior (distance of approaching vehicle) and tied it to decision making (controlling a traffic light) in order to create an incentive toward a certain desired behavior. That's a prime example of something where people will learn the system and game it to optimize their own advantage instead of the desired behavior.