311
Streetsblog helped get a bogus “No Bikes” sign removed near Promontory Point, where drivers have been parking illegally
Sure, this wasn't one of Chicago's most urgent problems, but it's good that we were able to get a building to stop telling bike riders they can't park in front of the property.
Twitter comes to the rescue for fixing a wheelchair-hostile sidewalk
It's fine to shout from the rooftops about an infrastructure problem via Twitter like John did. But it's also a good idea to file a request via the 311 app.