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orion-gtfs
Gets GTFS sources from config and uploads them to S3

AWS Lambda Function runs hourly and updates the GTFS source files with the ones linked to in the config.

Purpose
We need a single reliable. source for GTFS files for each agency. Uploading them to S3 gives us versioning in case a GTFS update is broken (or just happens to break us) along with durability in case the agency changes the path of its GTFS or if it disappears.

Usage
This GTFS is used by all our services and clients

• use config file for muni

Given a vehicle's coordinates, we don't actually know how far it is along its route. The goal of this util is to take a GTFS, a vehicle's (or stop's) coordinates, and its route, and tell us how far it is (between 0.0 and 1.0).

Usages:

• figuring out whether a vehicle has passed a stop
• easily getting and comparing vehicle travel times along a route

See https://github.com/remix/partridge for parsing Muni's GTFS file - https://www.sfmta.com/reports/gtfs-transit-data