Open Data

Welcome to Community Transit's Open Data Portal (the "Service", "Site" or “Data”). If you continue to use the Service or access any materials on the Site, you agree to these Terms of Use, as they may be updated or modified by Community Transit at any time.

This Service contains downloadable data produced by Community Transit. This Service may also contain Data from entities other than Community Transit. Maintenance of external data is the responsibility of the owning entity, and Community Transit does not attest to the quality or accuracy of said data.

Community Transit disclaims any warranty of merchantability or warranty of fitness of this Data for any particular purpose, either express or implied. No representation or warranty is made concerning the accuracy, currency, completeness or quality of Data depicted. Any user of this Service assumes all responsibility for use thereof, and further agrees to hold Community Transit harmless from and against any claim, damage, loss, or liability arising from any use of information provided by the Service.

In no event will Community Transit be liable to any party for any direct, indirect, incidental, consequential, special or exemplary damages, or lost profit resulting from any use or misuse of this Data. Additionally, Community Transit is not liable for any inaccurate Data. Community Transit reserves the right at any time and from time to time to modify or discontinue the Service (or any part thereof), temporarily or permanently, with or without notice to you.

You agree that Community Transit will not be liable to you for any modification, suspension or discontinuance of the Service. Community Transit logos are trademarks or registered trademarks of Community Transit and may not be used in any manner that is likely to cause confusion, or in any manner that disparages or discredits Community Transit.

The General Transit Feed Specification (GTFS) is the industry standard data format for transit schedule data. Community Transit provides schedule data in this format for all Community Transit bus service, as well as Sound Transit routes operated by Community Transit.

If you are using Community Transit’s GTFS data, please be sure to keep your data up to date. Major changes to Community Transit schedules typically occur twice a year (March and October), but off-cycle changes are common as well. Major schedule changes will be noted in advance on the “CT Open Data” Google Group.

Documentation

Official documentation for the GTFS Specification may be found here. (http://gtfs.org/reference) To supplement the official GTFS specification, we provide additional documentation specific to Community Transit’s GTFS data. It can be found here.

GTFS-RT is the industry standard data format for providing arrival prediction data, live vehicle locations, and service alerts. An extension of GTFS, GTFS-RT must be used in conjunction with an agency’s GTFS data.

Community Transit publishes three GTFS-RT feeds:

• Trip Updates. This feed provides predicted arrival or departure times for stops throughout a trip, as well as information on trips or stops that have been cancelled or re-routed. Click here for a sample of the Trip Update Feed.
  
• Vehicle Positions. This feed provides the locations of vehicles currently in service. Click here for a sample of the Vehicle Positions feed.
• Service Alerts. This feed provides information on disruptions to service. Click here for a sample of the Service Alerts feed.
  

Documentation
Official documentation for the GTFS-RT Specification may be found at http://gtfs.org/realtime

Feed URLs

• Trip Updates: http://s3.amazonaws.com/commtrans-realtime-prod/tripupdates.pb
• Vehicle Positions: http://s3.amazonaws.com/commtrans-realtime-prod/vehiclepositions.pb
• Alerts*: To be released at a later date

Community Transit provides Geographic Information System (GIS) data of stops and routes for all Community Transit bus service, as well as Sound Transit routes operated by Community Transit. This data includes stop locations, route sequences and trip statistics by day type (weekday, Saturday and Sunday). Files are provided as shapefiles and maps created in ESRI ArcGIS. Data is provided as a package of files for each major service change which typically occurs twice a year (March and October).