Deterministic cellular-automaton traffic for Unity: multi-lane roads, signals, lane changes, accidents, live stats, and a protected core DLL.AstarIT Traffic turns a rigorously-defined traffic-flow model into a drop-in Unity system. Instead of ad-hoc waypoint followers, vehicles are driven by a Nagel–Schreckenberg cellular automaton extended with spatial anticipation, comfortable braking, slow-start, lane-changing and intersection right-of-way. The result is traffic that behaves like traffic — queues that form and dissolve, jams that propagate backward, gaps that open for merges — and is fully deterministic and reproducible from a seed.The simulation core ships as a compiled, obfuscated .NET Standard 2.1 DLL with a small, stable public API. Your project talks to it through a thin, event-driven MonoBehaviour layer, so the model and the rendering are cleanly separated: you can restyle the visuals, swap car models, or drive your own gameplay off the simulation events without touching the model.Motion is rendered with snapshot interpolation and a clamped cubic-Hermite curve, so discrete cell hops read as continuous driving on straights and lane changes. Left/right turns get an L-shaped sample path at junctions to reduce diagonal cut-through. Two built-in visual presets (Background / CloseUp) and pace presets (Urban / ClearIntersection) let you tune for distant ambient traffic or closer cameras without touching the model.WHAT'S INCLUDED• AstarIT.Traffic runtime + editor scripts (full source of the Unity integration layer)• AstarIT.Traffic.Core.dll — protected simulation core (.NET Standard 2.1)• Eight demo scenes: compact 4-way, 2-lane and 4-lane intersections, highway link, two T-junctions, ring road, 2-lane arterial• Vehicle prefabs for Light, Cargo, Bus, Wagon• Manual, Quick Start, Integrations/ROAD_TOOLS.md, Third-Party NoticesGREAT FORDriving/parking games, city builders, management sims, ambient city traffic, urban-planning visualizations, and deterministic testing / analytics sandboxes.SUPPORTEmail: contact@astar-it.com• Built and tested on Unity 6000.4.7f1 (Built-in materials included; URP: assign your own materials)• No third-party runtime dependencies; Api Compatibility Level .NET Standard 2.1• Protected obfuscated core DLL + open Unity adapter source (asmdefs included)• Deterministic seeded simulation; event API: spawn / move / road-switch / crash / despawn• Multi-lane roads, signalized intersections, lane changing, accidents, physics-reactive wrecks (opt-in)• Editor tools: Traffic Editor, Validate Network, Quick Network, Path Adapter, one-click demos, live stats• Visual presets: Background / CloseUp; pace presets: Urban / ClearIntersection• Not DOTS/ECS — city-block scale (tens–hundreds of vehicles), not 10k crowds• Demo camera uses legacy Input Manager (set Active Input Handling to Both if needed)Promotional key art thumbnail was created with AI assistance. Core simulation code, Unity integration, demo scenes, and vehicle prefabs are original (non-AI).
