# Summary

 - [About](./ch-00-definitive-guide-to-gtfs-realtime.md)
 - [Introduction](./ch-01-introduction.md)
 - [Service Alerts](./ch-02-service-alerts.md)
 - [Vehicle Positions](./ch-03-vehicle-positions.md)
 - [Trip Updates](./ch-04-trip-updates.md)
 - [Protocol Buffers](./ch-05-protocol-buffers.md)
 - [Consuming Service Alerts](./ch-06-consuming-service-alerts.md)
 - [Consuming Vehicle Positions](./ch-07-consuming-vehicle-positions.md)
 - [Consuming Trip Updates](./ch-08-consuming-trip-updates.md)
 - [Database Storage](./ch-09-database-storage.md)
 - [Extensions](./ch-10-extensions.md)
 - [Publishing Feeds](./ch-11-publishing-feeds.md)
 - [Conclusion](./ch-12-conclusion.md)