I virtually dismantled the Red Line to show how important it is to get around the North Side via transit.
Mapzen, a fantastic company that makes free and open source mapping tools, and for whom I’m an independent contractor, updated its Mobility Explorer map to show where you can go from any point in a city by transit if a piece of existing transit infrastructure didn’t exist.
So, I handily took out the Red Line – the Chicago workhorse, carrying 145,000 people each weekday north of State/Lake station. The map shows the analysis, called an isochrone, as if you were departing from the Wilson station in Uptown.
You can download the map as a GeoJSON, open it in QGIS, and measure the area in square miles that each scenario covers.