https://marco.org/2009/07/02/gridlocked-rush-hour-is-a-quick-fun-iphone-game
Gridlocked: Rush Hour is a quick, fun iPhone game that David got me hooked on. It’s like a slightly faster version of Flight Control for car traffic.
The road slowly gets flooded with cars and you control the red-light state of the 6 intersections. Just tap each intersection and the light changes to the other direction. That’s it. If too many cars get backed up for too long, you lose. Easy, right?
My best score so far is 351 on Medium.