DCA is a Canadian company that currently operates in 6 provinces and has a number of service providers. Service Providers are privately owned companies or individuals who hold the required credentials and operate under contract to administer DCA protocols and assessments.
ADTSEA is the professional association representing traffic safety educators in the US and abroad. The Web site has an online version of their quarterly publication "The Chronicle" and a resource library containing traffic safety articles and links. They also have an online driver education survey.