This app scrapes https://webapps1.cityofchicago.org/StreetClosure/org/cityofchicago/streetclosure/cdot/getreport.do for street closure data and geocodes it once every 24 hours.
See the most recent results at https://streetscrape.herokuapp.com/closures
streetscape is one of the four components of PBR: Personalized Bike Routing.