1 to 9 pick a phase, and the green one again holds it · space pauses · F is fast · scroll zooms, drag pans · click an ambulance or a motorcade · the rules run on their own
you a rule the plan the offset the corridor the outage flash
A roundabout: no lights and nothing to press. Every car yields to the ring, and the ring never stops for anyone. Switch it off in the shop to play this board's signals.
Protected lefts: the arrow phases serve the inner lanes alone.
Loops are live: a queue rule fires when its lane fills.
Phases marked + are bought: the cycle never comes round to them. Press one, or name it in a rule.