If you've been struck by an automobile, it's important to follow these steps right away:
Move to a safe location (leave your bicycle where it was on the roadway)
Get the license plate number of the car involved
Call the police
Obtain the driver's insurance information
Obtain the driver's license information
Take pictures of the scene (including the damaged bicycle, roadway, injuries, insurance information of the adverse driver, driver's license of adverse driver, etc.).
Obtain a police report if possible