Signal danger is a web app for visualizing the most dangerous traffic signals based on the number of pedestrian and bike crashes. The current version visualizes clusters of crashes using an open source mapping api named Leaflet.js on top of traffic signal makers. The next step will be to create a ranking of the traffic signals based on the number of crashes that took place within a certain vicinity.
Online Demo: http://temp-bimba.cloudapps.unc.edu/