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General Transit Feed Specification (GTFS) is an open format spec used by hundreds of transit agencies to power transit directions in a variety of Web and transit apps, including Google Maps. The information provided through data feeds includes static schedule and service data using an open standard.

While we provide the data and maintain the sources, we're not able to provide support directly in how to write your software. Please, keep CTtransit information current. We make it easy, we'll let you know when we have new or updated data. Just sign up.