A free browser game about running the traffic network of a mid-size winter city. You are the operations chief. People need to get where they are going and the network is failing them. You have a budget, a fixed amount of street width, and a full toolkit: lane conversions, signal retiming, bus lanes, protected bike lanes, transit routes, turn restrictions, snow clearing priorities.
The game grades you on one thing. Moving people. Delay, throughput, reliability. Nothing is scored on virtue. The tools that work in real cities work here for the same geometric reasons, and you find that out by playing rather than by being told.
Under the surface it is an honest simulation. Cars follow each other on a real car-following model, queues take up physical space and spill back through the intersection behind them, and a network that looks fine at nine in the morning can be gridlocked by half past. Nothing is faked to make a point.
Winter is the stress test. Storms arrive on a forecast and take whatever you built with them. Fair-weather networks collapse. Networks with slack in the cross-section, a plowed bike route, and a transit spine ride it out. Snow clearing is an operations decision, not a debuff.
Status: in development. The simulation engine is built and running — a 2 km² district called Riverbend, 239 streets, 129 intersections, and up to a few thousand vehicles all individually simulated. There is no interface yet. That is the next piece of work, and there will be something to play here when it exists.