No. Under Department of Transportation (DOT) Americans with Disabilities Act (ADA) regulations at 49 C.F.R. Section 37.167(d), transit entities are only required to allow service animals to accompany individuals with disabilities in vehicles and facilities. DOT ADA regulations at 49 C.F.R. Section 37.3 define a service animal as an animal “individually trained to work or perform tasks for an individual with a disability.” 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. Simply providing comfort is something that animal does passively, by its nature or through the perception of the owner. However, the ADA does not prohibit a transit agency from choosing to accommodate pets and comfort animals, which would be a local decision.