# Site map

Google Transit specifications and guidelines help developers build innovative transit
apps. The following sections provide links to information on how to work with static and
realtime transit feeds.

## GTFS Static

- [GTFS Static overview](https://developers.google.com/transit/gtfs)
- [Test GTFS feeds](https://developers.google.com/transit/gtfs/guides/tools)
- [Static validation errors and
  warnings](https://developers.google.com/transit/gtfs/guides/static-errors-warnings)
- [Frequently asked questions (FAQ)](https://developers.google.com/transit/gtfs/guides/faq)
- [Community](https://developers.google.com/transit/gtfs/community)
- Samples

  - [Overview](https://developers.google.com/transit/gtfs/examples/overview)
  - [Example GTFS feed](https://developers.google.com/transit/gtfs/examples/gtfs-feed)
  - [Data examples](https://developers.google.com/transit/gtfs/examples/data-examples)
  - [Block transfer
    examples](https://developers.google.com/transit/gtfs/examples/block-transfer-example)
- [Reference](https://developers.google.com/transit/gtfs/reference)
- Data modeling

  - [Route modeling guide](https://developers.google.com/transit/gtfs/data-modeling/route-modeling-guide)

  GTFS extensions
  - [Extended GTFS route
    types](https://developers.google.com/transit/gtfs/reference/extended-route-types)
  - [Google
    Transit ticketing extensions](https://developers.google.com/transit/gtfs/reference/google-transit-ticketing-extension)
  - [Glossary of Google Static Transit
    terminology](https://developers.google.com/transit/gtfs/reference/glossary-static)

## GTFS Realtime

- [GTFS Realtime overview](https://developers.google.com/transit/gtfs-realtime)
- [Realtime validation
  errors and warnings](https://developers.google.com/transit/gtfs-realtime/guides/realtime-errors-warnings)
- [Community](https://developers.google.com/transit/gtfs-realtime/community)
- Samples

  - [Feed examples](https://developers.google.com/transit/gtfs-realtime/examples)
  - [Service alert example](https://developers.google.com/transit/gtfs-realtime/examples/alerts)
  - [Full trip update
    example](https://developers.google.com/transit/gtfs-realtime/examples/trip-updates-full)
  - [Vehicle Position
    example](https://developers.google.com/transit/gtfs-realtime/examples/vehicle-positions)
- Reference

  - [GTFS Realtime reference](https://developers.google.com/transit/gtfs-realtime/reference)
  - [Glossary of Google
    Realtime Transit terminology](https://developers.google.com/transit/gtfs-realtime/reference/glossary-realtime)