American Bus Association
- Trade association representing motorcoach and tour companies, travel and tourism organizations, and suppliers of bus products and services in the U.S. and Canada.
- http://www.buses.org

Motor Bus Society
- Nonprofit educational organization. Collects and publishes information about the history and development of the bus industry. Links include bus manufacturers, distributors, parts, bus conversions, professional and regulatory associations.
- http://motorbussociety.org/

Tbuses for London
- Campaigning for quiet, clean urban transport Using Overhead Electric, Zero Emission Buses.
- http://www.tbus.org.uk/