The code here is for a Shiny App that allows you to visualize and analyze accidents in Chicago, with an emphasis on Chicago's red light cameras. The site can be found at MiningChi.com.
The current functionality allows you to enter in an address and a width for a buffer. The site will then calculate accidents within this range.
For those interested in red light cameras, the site provides data on accidents that occurred within a 100 feet of a red light camera or speed camera between 2009 to 2012. The ticket data includes tickets from 2007 to March 2014. Ticket data does not exist for all intersections. The analysis is automated with over 300 intersections, so please let us know if something doesn’t look right.
All the data and and code for this site are all freely available. This site is just one of many related MiningChi projects on data visualization and statistics.