There are many different types of motor vehicles that can be in collisions:
If you or a loved one is in a collision of any kind, it is important to make sure you get whatever medical interventions you need. Sometimes, that means being taken via ambulance for immediate emergency evaluation or treatment. Other times, it may mean being brought to the emergency room or urgent care at a later time. Sometimes it means setting up a visit with your primary care doctor for pain or problems that are persisting. Be sure to follow your doctor's instructions.
If you have property damage, it is important to open up a claim with your own insurance company if you have full coverage. If you do not have full coverage, you will need to open the claim with the defendant's insurance carrier. Be wary of what you share with the other insurance company.
If you or a loved one have an injury - no matter how severe or mild - DO NOT SPEAK with the insurance company. It is better to call an attorney first because it is much easier to do things correctly from the beginning rather than trying to undo any harm that may happen.