Traffic Safety - As enacted, authorizes counties to delegate authority to the chief administrative officer of the county highway department to set lower speed limits on county roads if the department employs an engineer who is capable of completing required engineering and traffic investigations. - Amends TCA Title 55, Chapter 8.

SB 954 allows Tennessee counties to set lower speed limits on county-maintained roads, with the option to delegate this authority to the chief administrative officer of the county highway department. This delegation is only permitted if the department employs a qualified engineer capable of conducting required traffic investigations. The bill mandates that all speed limit changes must follow standard traffic engineering practices, align with the MUTCD guidelines, and be properly documented. The law, effective April 3, 2025, directly affects county highway departments and their engineering staff in implementing local speed limit adjustments.