Only service animals are allowed on all transit vehicles. Under Department of Transportation (DOT) Americans with Disabilities Act (ADA) regulations, the definition of a service animal is an animal “individually trained to work or perform tasks for an individual with a disability.” Animals meeting this definition are considered service animals under the ADA regardless of whether they have been licensed or certified by a state or local government. If an animal’s only function is to provide emotional support or comfort for the rider, that animal would not fall under the regulatory training-based definition of a service animal. Service animals are working animals and not pets. Service animals must always be under the control of the owner and well-behaved. Any service animal will be removed if it shows signs of aggression or inappropriate behavior, such as uncontrolled barking, growling at other passengers, jumping on other passengers, or running away from the owner.