Map created by jatorre.
This is a map of the traffic status in Barcelona. It has been created using the public data from the Barcelona Open Data Portal.
This map has been created to demo how to use CartoDB to represent dynamic data. The data in the source changes more or less every 15 minutes. Through a little script in AppEngine we update the data on CartoDB. Because maps on CartoDB are dynamically generated, what you see here is the latest map from the latest data.
On the GitHub repository the README goes through all the details on how this has been created. If you have technical questions use the CartoDB google groups, and here if you want to contact the author.