text: You may have to sue.  Look for the bicycle coalition website for your area.  They are a great source of information.  The below is from Wisconsin but the San Francisco rules say the same thing.\n\nHere are some sites for Illinois:  http://www.bikelib.org/index.htm\nhttp://www.stlbikefed.org/DesktopDefault.aspx\n\nWhat to do after a traffic collision\n\nIf you're hurt in a traffic collision, don't ride away or shake off what seems like a minor injury. You might find later that it's worse than you thought. If you're a victim of, or a witness to a traffic collision, here are the steps to take:\n\n    * Call the police. If needed, get medical help immediately.\n    * Get the following information from every vehicle: driver name, address, phone number, driver's license number, license plate number, make of car, insurance company name and policy number.\n    * Get the names and phone numbers of witnesses.\n    * Get the police report number from police on the scene.\n    * Write down how the crash happened while it's fresh in your memory.\n    * Keep (or photograph) any damaged clothes or equipment. Also, if you're a victim:\n    * Don't get mad at the scene. Keep a level head so you can ask questions and take notes.\n    * If you're injured, don't move unless you're sure you won't injure yourself more