What do I do if I have severe allergies to something I encounter on a public transportation system (i.e., service animals, cigarette smoke at bus stops, etc.)?

Encountering cigarette smoke, service animals, and other potential allergens is a function of going out in public. Adoption of a no smoking policy at bus stops is a local issue and is not covered under the Americans with Disabilities Act (ADA); however, you may contact your local transit authority to discuss such a concern. Under Department of Transportation (DOT) ADA regulations at 49 C.F.R. Section 37.167(d), public transit providers are required to allow trained service animals to accompany riders on vehicles.