ADAS modification ranges and tolerances study

(a) Study required Not later than 12 months after the date of the enactment of this Act, the Secretary of Transportation, acting through the Administrator of the National Highway Traffic Safety Administration, shall complete a study and submit to Congress a report that assesses the safety needs, feasibility, capability, and cost to the National Highway Traffic Safety Administration to develop and maintain industry guidelines to support the functionality of ADAS and vehicle dynamic systems installed in passenger motor vehicles for a model year on and after 2028 after a passenger motor vehicle is modified or customized. The study shall consider the development of industry guidelines relating to the following: (1) Vehicle tolerance and system sensitivity information relevant to calibration following modification. (2) Allowable modification ranges and tolerances for passenger motor vehicles, including physical parameters that impact ADAS and vehicle dynamic systems functionality, including ride height, wheel and tire dimensions, overall static geometry, physical displacement parameters, and sensor and camera function. (3) Quantifiable tolerance thresholds for changes in vertical, longitudinal, and lateral displacement, in all axes, necessary to maintain proper ADAS functionality. (4) Proper calibration procedures of ADAS and other vehicle dynamic systems following repair, modification, or component replacement. (5) Confirmatory test protocols and performance validation metrics that allow owners, service providers, and independent repair facilities to verify the operational integrity of ADAS after calibration. (b) Stakeholder outreach In carrying out the study required under subsection (a), the Administrator shall consult with manufacturers of passenger motor vehicles and equipment, standard setting organizations, the independent automotive aftermarket, and dealers.