Try to compose yourself (stay calm), turn on hazards
Call 911, request ambulance if there are any injuries
It is so important we will mention it again, call 911. It is very important that you get a police record and that all the information is accurate pertaining to the other drivers insurance info and it can also be helpful to jot down the other parties license plate number.
Exchange the information with other party and document where, when, and how accident occurred
Document any witness information
Take some pictures of the damage of vehicles, location, and other party's drivers license and insurance ID card.
Report the accident to us or insurance company directly (There is a 24/7 claims telephone number on your insurance ID card)