Defensive Drivers Group California
923 Arguello St. Ste C
Redwood City, CA 94063
Business hours: Monday to Friday, 8 am-2 pm Pacific Time.
Defensive Drivers Group MI
9811 Dixie Hwy Suite 1
Clarkston, MI 48348
Toll-free hotline: 877-883-7290
TDD for the hearing impaired: 800-735-2929
For help with the Defensive Drivers Group online traffic school for California, you can also email:
Email: support@defensivedriversgroup.com