Compare the railway stations that accessible by pedestrians and wheelchairs. A leaflet map visualizes the regions where people can get on a train. See the map getting blank when you are on a wheelchair. The data comes from OpenStreetmap's Overpass API.
Programming Thomas Schmidt netAction, MIT License
Map data Open Streetmap contributors, ODbL License
Station data Overpass API
Mapquest Tiles Tiles imagery Courtesy of MapQuest
Map visualisation leaflet, MIT License
Framework jQuery, MIT License
A nice feature might be direct access to different cities via URL Hash. Let me know if you need this.