This bill directs the Secretary of Transportation to significantly enhance the capabilities of automatic emergency braking (AEB) systems in light vehicles. It mandates a rulemaking process to amend existing federal motor vehicle safety standards for AEB, with a focus on improving safety for vulnerable road users. The bill also sets a compliance date of no later than September 1, 2029, for the current AEB rule. Specifically, the bill requires AEB systems to function effectively in daylight and low-light conditions and across the full range of speeds currently specified for pedestrian AEB. A crucial provision is the requirement for these systems to detect and respond to a broader category of vulnerable road users, such as bicyclists, motorcyclists, and individuals in wheelchairs , accounting for diverse appearances in skin, clothing, and gear. The Secretary must initiate this rulemaking within 180 days of enactment and issue a final revised rule within two years thereafter. Compliance with the revised rule will be required within two years of its issuance.