Look down on a real city's streets from above. Turn up the cars, drop accidents, retime the lights, summon a storm — then watch the jams ripple and try to keep the city flowing.
Cars drive on the actual street network — not a fake grid — using a real car-following traffic model. Every jam emerges on its own.
Built on real map roads, so traffic flows down the city's actual avenues and intersections.
Each car follows the road ahead with real physics. Slow cars create rolling jams behind them.
Roads glow green → amber → red as they clog up. Read the whole city at a glance.
Tap any junction to retime its signals. Bad timing turns a corridor into a parking lot.
Drop accidents on any road and watch the queue grow upstream. Clear it and watch it dissolve.
Summon rain, snow, storms and lightning. Bad weather slows every car — and looks the part.
Drop into a real metropolis. The road network loads under your camera.
Slide the volume and slow-car dials to push the city toward gridlock.
Accidents, light timing, rush hour, weather — bend the flow to your will.
Collect ⭐ star coins from daily check-ins to unlock new cities worldwide.
Start with free cities, then unlock majors around the globe with ⭐ star coins.