Emerging Technologies

How digital maps can improve public transport

Diego Canales
Sustainable Urban Transport Specialist, The World Bank
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The first step in any transit planning process involves understanding the current supply and demand of transit services. In most of the countries where we work, understanding the supply of services is a messy, costly and lengthy process, since most cities have little knowledge of bus routes, services and operational schemes.

Having a digital map (GIS) and General Transit Feed Specifications (GTFS) details of a network allows a transit agency to do better service planning and monitoring, as well as provide information to its users. A traditional GIS software approach often requires a team of consultants and months of work.  Last month, however, we were presented with the challenge to use innovative tools do the same work in less than two weeks.
This was our first visit to Cairo, Egypt, and there we were tasked with the goal of mapping the city’s entire bus network (approximately 450 formal bus routes) in order to conduct an accessibility analysis with our new Accessibility Tool. At first hand this task seemed daunting, and a few days after arriving we were not certain that we could accomplish it in two weeks.

Before our trip, we had agreed on a somewhat flexible work plan, laying out an array of potential open-access, free tools that we could use depending on the scenarios we would encounter, mostly dependent on the availability of data.

  • If there was no print  information  or  nobody knew anything about the routes’ alignments, we had planned to use Transitwand, an open-source web and mobile application for collecting transit data relying on smartphone GPS. However, this approach requires a handful of students/volunteers to ride each route from point to point in order to record the data.
    • (Transitwand consists of 1) an Android smartphone app that can be downloaded for free, and is used for collecting the data while riding the bus (you can also mark stops and do passenger counting); and 2) the back-end server (hosted by Conveyal,) which receives the collected data from the app via wi-fi and allows you to download them from the server as CSV coordinates or shapefiles. 
  • Our other option was TransitMix, an open-source web-based sketching tool conceived to help transit planners draw new or existing routes for community outreach purposes. It allows exporting the sketched routes as shape files or KML files (with data and parameters that allow to create a GTFS dataset out from the shape file).  (On a technical note, it also downloads a json file that contains parameters that enables use of the code for transforming shape files into GTFS datasets, which allows creating stops every specified distance geom2gtfs).

Upon arrival, we reached out to our counterparts in the Cairo Transport Authority (CTA) and Cairo Traffic Engineering Bureau (CTEB). Fortunately, the availability of paper maps of the routes from the transit agency allowed us to use the quickest option: Transitmix, although this tool had never been used for such a task. In very little time (less than a week), we were able to sketch out the 450+ routes using this tool, download the routes as digital maps, and create the general specifications of the GTFS format.

We stayed in Cairo a couple of days to train the people from CTA on how to use Transitmix, in order for them to do a quality assurance process by checking and correcting any errors we could have made. The ease of use of this tool allows first-time users to quickly grow comfortable with it. Going forward, this will allow the Transit agency to update the digital maps, with any service, route or operational changes in the future.

We also believe that, by having the digitized data in the cloud, it can be better preserved with changes in government or administrations, as opposed to what we have seen in many other cities where the data sitting in a disk or a particular hard drive is often lost.

We also had the opportunity to meet with Cairo’s Governor, Dr. Galal Said, who was keen on making this work Open Data. Having the routes with the GTFS specifications will allow it to be integrated into trip planner services, such as Google Maps or any app that utilizes this format. This will allow anyone in Cairo to better understand the availability of services, and navigate the transit system with much more ease than before.

The availability of open-access, web-based tools has dramatically decreased the barriers to create GIS and GTFS datasets of transit systems around the world. These tools are free (or very low cost), easy to use and utilize web-based platforms, requiring no need for software or advanced hardware. Being able to quickly digitize the transit systems of cities around the world will allow for better service planning and monitoring.

Digital maps of public transportation supply services will also allow us to better understand how a mobility system is serving an urban area, combined with other planning tools (such asthis Accessibility tool) and provide better routing information to the system’s users.

We want to thank our colleague Howaida Kamel, who provided us with invaluable support on the ground for making this project.

This article is published in collaboration with The World Bank’s Transport for Development Blog. Publication does not imply endorsement of views by the World Economic Forum.

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Author: Tatiana Peralta-Quiros is a Junior Professional Associate in the Urban Development and Resilience Unit at The World Bank. Diego Canales is a sustainable urban transport specialist at the World Bank.

Image: Traffic crosses over the new diagonal crossing at Oxford Circus in London REUTERS/Stefan Wermuth. 

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