Here are links to different
associations for the transportation industry.

Associations in Canada:
AMTA (Alberta Motor Transport Association): http://www.amta.ca
APTA (Atlantis provincial trucking association): http://www.apta.ca
CIFFA (Canadian Int. Freight forwarders association): http://www.ciffa.com
British Columbia Trucking Association: http://www.bctrucking.com
Ontario Trucking Association: http://www.ontruck.org

Associations in the United States:
American trucking association:http://www.truckline.com/index
Intermodal Freight association: http://www.intermodal.org
OOIDA (Industry drivers association) http://www.ooida.com
California trucking association: http://www.caltrux.org
NTASSOC (North American Transportation Association): http://www.ntassoc.com
Mid-West Truckers Association: http://www.mid-westtruckers.com