I've actually taken some sociology classes about this and the professor was a physicist who went into sociology and he used a lot of maths and modeling to tackl

I've actually taken some sociology classes about this and the professor was a physicist who went into sociology and he used a lot of maths and modeling to tackle this problem in a local city. Unfortunately I do not have any data on this anymore but I remember it being surprisingly complex because human behaviour plays a big role, but there are massive improvements to be made with traffic lights, and so he did.