Unauthorized vehicles may be impounded by a registered tow truck operator (RTTO) at the direction of a law enforcement officer or other public official with jurisdiction, if the vehicle is on public property, or at the direction of the property owner or an agent.  A vehicle is deemed unauthorized if it is left unattended in certain public or private locations.  A vehicle is immediately considered an unauthorized vehicle and subject to removal if it is:

• determined by a police officer to be an accident or traffic hazard; 
• in a publicly owned or controlled parking facility with properly posted signage;
• on residential property;
• on private, nonresidential property with properly posted signage; or
• within the right-of-way used by a Regional Transit Authority for high-capacity transportation where the vehicle constitutes an obstruction to the operation of high-capacity transportation vehicles or jeopardizes public safety.

A vehicle is considered an unauthorized vehicle and is subject to immediate removal by an RTTO if it is left unattended within a right-of-way used by a city with a population greater than 700,000 for streetcar operations, where the vehicle obstructs the operation of a streetcar vehicle or jeopardizes public safety.  An authorized representative of a city with a population greater than 700,000 may request an impound for this type of unauthorized vehicle.