This is a visualization of Ulm Public Transport System's degree of accessibility. The idea for this comes from the Hamburg initiative Mappable, the Ulm implementation is based on Fiona Krakenbürger's adaption for Berlin.
You can find an elaborate How-to here.
Cave: This map is based on SWU's Liniennetzplan 2013. Please take note that the City of Ulm has been remodeling a series of bus stops to make them wheelchair accessible, and is continuing to do so. These changes are not yet represented within this map.