GTFS connection stops

This project maps stops from different feeds to one ID, together they form a connection_stop. This way, Linked Connections can be calculated that enable interoperability between different operators.

The result will be a CSV file with the original stop_id and new connection_stop_id fields. gtfs2connections uses this file to map stops of different transit operators to one "parent" stop.

Note: this is just a quick solution to avoid GTFS footpaths for my thesis.

Requirements

• MongoDB
• NodeJS

Install

• Clone this project
• Install depencies: npm install

Load stops.txt

Specify paths to zipped GTFS feeds that you want to calculate parent stations (called connection stops) for. It's important to note that the order of the feeds you specify is used in the ID selection process. If you want the connection stop ID taken from feed2.zip then you have to put it first.

The stops will be loaded inside gtfs-connectionstops collection of MongoDB.

node load_stops.js feed1.zip feed2.zip feedX.zip

Calculate connection stops

The script calculate.js uses a default distance of 200 metres as metric for footpaths. (This has to be so much for big stations).

node calculate.js > connection-stops.txt

This also generates a stops.js and stops.json file with a JSON-object that contains all the stops with their stop_id as key. This is used in my demo: https://github.com/brechtvdv/thesis (note: add var stops = in the front);

After calculation, the collection is removed so you have to run load_stops.js again to recalculate connection-stops.txt.

Generate random queries

To generate queries, run the following script:

node generate_queries.js > queries.js

Load neighbouring stops

In project gtfs2connections a CSV-file drs-[agency_id].txt is generated that contains for every stop the direct reachable stops with their time offset. This script calculates the minimum time between a stop and every neighbour within a certain connection range. This way a Linked Connections server optimization can be implemented that retrieves the viable connections around a certain departure stop.

Configure the correct paths for MongoDB url, feed and Direct Reachable Stops file inside initMOBcalculation function. Make sure you have a stops.json file in the root of the project, generated during the calculation of connection stops.

node neighbours.js