How Do I Schedule a Commercial Skills (Road) Test? Systems Admin May 22, 2020 20:46 Updated Follow Please call our help center at 615-502-4179 and press 3, or you can email us at DI.CDL.CSTIMS@tn.gov. Tennessee Dept of Safety Website Related articles Where can I find the CDL Manual? What is the CDL customer service phone number? How do I obtain a Skill Performance Evaluation? Documents needed for medical certification processing Newsletter 06/19/2018 Comments 0 comments Please sign in to leave a comment.