ffff. Can confirm, people setting up traffic lights are idiots. Sometimes they're set up based on 15 minutes of observation. I don't care how many weeks you run your crappy simulations, they're so inaccurate that its laughable.

Source: I built a startup in this industry to prove it.

Edit: I kid you not, I once went to a conference and a traffic engineer for a sizable city got on stage to present the best idea they had and it went like this:

> So once traffic gets to 80% on the main road, we're just going to change all the lights to green and everybody on the side streets can just suck eggs for 5-7 minutes.

That's it. That's the best their simulations could come up with. These people use interns with clipboards to get their data.

Edit 2: "Suck eggs" were their words not mine.