1. Ensure Safety: First and foremost, make sure you and others involved in the accident are safe. Move to a safe location, if possible, and turn on hazard lights to alert other drivers.
2. Call Emergency Services: Dial 911 to report the accident and request medical assistance if needed. The police will also need to be notified to file an accident report.
3. Exchange Information: Exchange contact, insurance, and vehicle information with the other driver(s) involved. This includes names, phone numbers, addresses, insurance company names, policy numbers, and license plate numbers.
4. Document the Scene: Take photos or videos of the accident scene, including damage to the vehicles, skid marks, and any relevant road signs or traffic signals. This visual evidence can be helpful when filing insurance claims or legal proceedings.
5. Notify Your Insurance Company: Report the accident to your insurance company as soon as possible. Provide them with accurate details and any evidence you have gathered.
6. Seek Medical Attention: Even if you don't feel injured immediately after the accident, it's important to get a medical evaluation. Some injuries may not be apparent right away. Keep records of all medical examinations, treatments, and expenses related to the accident.
7. File an Accident Report: In Massachusetts, if the accident caused injury, death, or property damage exceeding $1,000, you must complete a Motor Vehicle Crash Operator Report within five days. You can find this form on the Massachusetts Department of Transportation website.
8. Consider Legal Advice: Depending on the circumstances, you may want to consult with a personal injury attorney who specializes in car accidents. They can guide you through the legal process and help protect your rights.

Remember, this information is a general guide. For specific legal advice and detailed information, it's recommended to consult official sources such as the Massachusetts Department of Transportation or contact a qualified attorney specializing in car accidents.