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Data Dashboard

Charts of MBTA performance (travel times, headways, dwells, slow zones), plus ridership and service levels for subway, bus, Commuter Rail and ferry. Our most-used project and the home of the API everything else reads.

Open the dashboard Repo
Stack Next.js (static export) · Python Chalice API
Runs on S3 + CloudFront, Lambda at dashboard-api.labs.transitmatters.org
Deploys Push to main 
flowchart LR
    events[("tm-mbta-performance<br/>events, alerts, benchmarks")]
    ddb[("DynamoDB<br/>trip metrics, ridership, …")]
    srd[("tm-service-ridership-dashboard")]
    v3(["V3 API<br/>live alerts, facilities"])
    api["Dashboard API<br/><small>Lambda</small>"]
    static[("static/ JSON<br/><small>slow zones, landing</small>")]
    site("dashboard.transitmatters.org")

    events & ddb & srd & v3 --> api --> site
    static --> site

The API only reads. Everything it serves is written by the data pipeline.

Good to know

  • No AWS access needed. Set TM_BACKEND_SOURCE=prod to point your local frontend at the production API. See the README.
  • Other apps depend on this API: Shutdown Tracker, slow-zones, data-ingestion, tm-data-mcp and transitmattr. Treat changes to existing endpoints with care.
  • The OpenAPI spec is generated into server/openapi.json.
  • Uses stripmap for the slow zone map.