scope:

SUMMARY:

This action withdraws the notice of proposed rulemaking (NPRM) published in the Federal Register on April 16, 2012, proposing amendments to Federal Motor Vehicle Safety Standard FMVSS No. 124, Accelerator Control Systems. The NPRM proposed to make two amendments to the standard: add a new brake-throttle override (BTO) requirement to address unintended acceleration situations and amend the return-to-idle requirements to include electronic throttle control (ETC) systems. After further analysis of the comments received and other considerations, the agency has decided to withdraw the rulemaking proposal because: the widespread adoption of the BTO system makes FMVSS changes unnecessary and a broader understanding of safe design of vehicle electronic control systems is needed to make an informed decision on regulating return-to-idle on ETC systems.