An at least for me total new gameplay machanic, since you are not under direct control.
Since you are controlling trafficlight and with it indirectly the whole traffic of differnet (urban) intersections.
You can play alone, with two or even up to three friends in local 4 player coop rounds. You are also able to play simply everything with your friends. Sadly only the mainplayer is getting Achievements (on Xbox).
But there is no online coop and no versus mode at all.
There are differnt modes available:
At our last gaming week, with lot of games available, this was our major game, which we played almost all the time.
Lavalampe

This is a typical intersection with four players playing in parallel. So everyone just has one button to press, but this is still pretty challanging with offline ccordination and shout outs at the couch.