New Train Tracker

A live map of the MBTA's new Orange, Red and Green Line cars, plus when each was last seen.

Open the tracker Repo

Stack	Vite + React · Python Chalice API
Runs on	S3 + CloudFront, Lambda at traintracker-api.labs.transitmatters.org
Deploys	Push to main

flowchart LR
    v3(["MBTA V3 API"])
    api["API<br/><small>Lambda</small>"]
    job["UpdateLastSeen<br/><small>every 10 min</small>"]
    s3[("S3<br/>last_seen.json")]
    site("traintracker.transitmatters.org")

    v3 --> api --> site
    v3 --> job --> s3 --> api

Good to know

• You need a free MBTA V3 API key to run it locally.
• It used to run on EC2. It's serverless now, so ignore old notes about SSH keys.
• The Containerfile is for running locally. It isn't deployed.