This is a pre-recorded, five-minute demo for the ECCV 2026 EmergingAD workshop paper “What Emerges and What Breaks in Self-Play Driving.” It was recorded with our Transformer policy running at 10 Hz and 25% nominal traffic occupancy. It follows thousands of simulated vehicles across Tartu roads mapped by the University of Tartu Autonomous Driving Lab (UT ADL). Each background vehicle starts with a route covering roughly two minutes of driving; after finishing, it is assigned another legal forward route when the road graph permits, so traffic continues throughout the replay. Use Play/Pause or drag the timeline to seek in either direction; when the timeline is focused, use Left/Right to step and Home/End to jump. Click or tap a vehicle to follow it and see its current waypoint. Drag, use WASD or the arrow keys to pan the map, scroll or pinch to zoom, or choose a landmark to jump across the city. Playback loops automatically.