# google/transit

Repository: https://github.com/google/transit
Canonical: https://ross.abutalabs.com/products/transit
Homepage: https://gtfs.org/
License: Apache-2.0
License Family: permissive
Last push: 2026-08-17T19:50:33+00:00

## Health v2 (maintenance only)
Score: 76/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 98, release rhythm 35, longevity 100
- inputs: {"age_days": 4067, "days_push": 16, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1052, forks 223 (observed 2026-08-28T04:03:23.412482+00:00)

## What it is
The General Transit Feed Specification (GTFS) is an open standard defining data formats for public transit information, comprising GTFS Schedule (static text files in a ZIP) and GTFS Realtime (Protocol Buffers feeds). This repository hosts the specification documentation and community governance for the standard used by thousands of transit agencies worldwide.

## Use cases
- publish public transit schedules in a standard format
- build a trip planner that consumes transit data
- serve real-time bus and train arrival updates
- understand the GTFS Schedule file reference
- implement a GTFS Realtime protobuf feed
- add fares, routes, and stops to a transit app

## When to choose
- you are a transit agency publishing rider-facing data
- you are building software that consumes or validates GTFS feeds
- you need the authoritative reference for GTFS Schedule or Realtime formats

## When to avoid
- you need a ready-made parser or validator library rather than the specification itself
- you need proprietary or non-transit mapping data formats
- you want executable code - this repo is primarily documentation

## Facets
- artifact type: dataset
- maturity: stable
- function: documentation, serialization, data-science
- domain: travel
- platform: cross-platform
- tags: gtfs, public-transit, open-standard, gtfs-schedule, gtfs-realtime, protocol-buffers, trip-planning, specification, maps, transportation, open-data, specifications

## Member repositories
- google/transit (main) score 76

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:23.412482+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T06:59:43.518814+00:00, confidence not recorded.
  - readme: https://github.com/google/transit (fetched 2026-08-28T04:03:23.412482+00:00, sha 3c7fd591cdb2)
  - homepage: https://gtfs.org/ (fetched 2026-08-29T13:01:50.325357+00:00, sha 105514ec3d6c)
  - site_page: https://gtfs.org/getting-started/what-is-gtfs (fetched 2026-08-29T13:01:50.334850+00:00, sha 1e5b717e9eaf)
  - site_page: https://gtfs.org/documentation/overview (fetched 2026-08-29T13:01:50.336854+00:00, sha b986457977d2)
  - site_page: https://gtfs.org/about (fetched 2026-08-29T13:01:50.338670+00:00, sha b508cdf69143)
  - site_page: https://gtfs.org/documentation/schedule/reference (fetched 2026-08-29T13:01:50.342206+00:00, sha b4c84b27ce2d)
  - site_page: https://gtfs.org/documentation/schedule/schedule_best_practices (fetched 2026-08-29T13:01:50.346914+00:00, sha 5bdb183ebec1)
  - site_page: https://gtfs.org/documentation/realtime/reference (fetched 2026-08-29T13:01:50.349378+00:00, sha 212e1b034888)
  - site_page: https://gtfs.org/documentation/realtime/realtime_best_practices (fetched 2026-08-29T13:01:50.352479+00:00, sha ce8efc05433b)
  - site_page: https://gtfs.org/getting_started/what_is_GTFS (fetched 2026-08-29T13:01:50.340321+00:00, sha 1e5b717e9eaf)
- Data as of 2026-08-30T08:39:29.467469+00:00.