Laws vary from state to state, but in most states it is a crime or criminal offense for the operator of a motor vehicle to leave the scene of single car accident involving an unattended (unoccupied) vehicle or other property, or to leave the scene of a single car accident involving highway fixtures (barricades, medians, guardrails), traffic control devices (stop signs, yield signs, railroad crossing gate arms, etc.), or other real or personal property (a ditch, embankment, or building).

It is also a criminal offense in most states for the operator of a motor vehicle to leave the scene of an accident involving personal injuries or death—including an accident in which the operator of a motor vehicle strikes a pedestrian or cyclist, for example. And it is a criminal offense in most states for the operator of a motor vehicle to leave the scene of an accident involving multiple motor vehicles.

The duties of an operator of a motor vehicle involved in an accident may vary from state to state and are usually located in a state’s statutes—often in a code titled with a name like “vehicles and traffic” or “transportation,” for example. These duties generally include:

• the duty to share information such as name, address, driver’s license number, and vehicle registration number with other motor vehicle operators involved in the accident, or owners of property involved in the accident—or with the police if such other persons are not able to receive the information;

• the duty to stop and locate or notify the owner of property involved in a motor vehicle accident (such as an unattended motor vehicle or other property) of the accident and of the motor vehicle operator’s name, address, and vehicle registration number, for example;

• the duty to notify the road authority (the state department of transportation, for example) of the accident, and provide the motor vehicle operator’s name, address, driver’s license number, and vehicle registration number, for example;

• the duty to stop and provide any person who suffered personal injuries or death with any reasonable assistance possible, including calling an ambulance to transport such person to the hospital for medical care or evaluation (known as the duty to stop and render aid); and

• the duty to report to the police any accident involving bodily injury or death of any person, or involving property damage.

In Massachusetts, under General Laws Chapter 90, Section 24, it is a criminal offense for the operator of a motor vehicle to leave the scene of an accident without fulfilling certain duties. These duties include stopping and providing information such as name, address, driver's license number, and vehicle registration to other parties involved or to the police. If the accident involves an unattended vehicle or property, the operator must make an effort to locate the owner or leave a note with their information. Additionally, the operator must report the accident to the police if it results in injury, death, or substantial property damage. Failing to stop and provide reasonable assistance to anyone injured, which includes calling for medical help if necessary, is also a criminal offense. The specific requirements and penalties for leaving the scene of an accident can vary depending on the circumstances, such as whether the accident resulted in property damage, injury, or death.