37 Tex. Admin. Code § 16.27 – Passing Rates for Written Exams

(a) Signs, rules, Class A and Class B, and motorcycle exams will require correct answers of 70% or more of the questions for the applicant to pass.
(b) Commercial driver license (CDL) examinations will require correct answers on 80% or more of the questions for the applicant to pass.
(c) All required exams outlined in §16.26 of this title (relating to Written Exams Required) must be passed in order to obtain a CDL and the appropriate endorsements.

Source Note:The provisions of this §16.27 adopted to be effective September 14, 2016, 41 TexReg 7117.