Relating to civil liability of a commercial motor vehicle owner or operator.

HB 4688 modifies Texas law for civil liability cases involving commercial motor vehicle accidents. It restricts when evidence of regulatory violations (like safety rules) can be used in court, requiring such evidence to directly link the violation to the injury and show the rule specifically applied to the situation. The bill also limits claims against employers for driver negligence unless the employer first admits the driver was acting within their job duties at the time of the accident. These changes apply only to cases filed or tried after the bill becomes law.