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Roadster

Own projectIn developmentSimulationrds-06

A what-if traffic simulator for city planners — test which signal retimes, lane changes and zoning edits actually reduce congestion, before spending a dollar.

Roadster loads a real OpenStreetMap street network (or a generated Pittsburgh demo), lets you paint land-use zoning, mark problem sections and propose fixes — then simulates a full rush hour with realistic vehicle behaviour and compares before/after metrics with clear costs.

Under the hood

  • Microscopic simulation — Intelligent Driver Model, vehicle classes, US rules (right-turn-on-red, protected/permissive lefts, all-way stops).
  • Live NEMA signal control with corridor coordination (green waves).
  • Time-of-day demand with AM/PM peaks and directional bias.
  • Scorecard — capital cost, $/year benefit and benefit-cost ratio per intervention, plus network Level-of-Service (A–F).

Runs entirely client-side in vanilla JavaScript over Leaflet — zero dependencies.

Status

In active development — the simulation core, signal control, scoring and before/after comparison are working.

Ranked interventions with cost and benefit-cost ratio.
Ranked interventions with cost and benefit-cost ratio.
Before/after Level-of-Service and delay over time.
Before/after Level-of-Service and delay over time.

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