Part 572; Anthropomorphic Test Devices; Test Device for Human Occupant Restraint 50th Percentile Adult Male Dummy (THOR-50M)

Document Headings Document headings vary by document type but may contain the following: the agency or agencies that issued and signed a document the number of the CFR title and the number of each part the document amends, proposes to amend, or is directly related to the agency docket number / agency internal file number the RIN which identifies each regulatory action listed in the Unified Agenda of Federal Regulatory and Deregulatory Actions See the Document Drafting Handbook for more details. Department of Transportation National Highway Traffic Safety Administration 49 CFR Part 572 [Docket No. NHTSA-2023-0031] RIN 2127-AM20 AGENCY: National Highway Traffic Safety Administration (NHTSA), U.S. Department of Transportation (DOT). ACTION: Supplemental notice of proposed rulemaking (SNPRM). SUMMARY: This document supplements NHTSA's September 2023 notice of ( printed page 60069) proposed rulemaking to amend NHTSA's regulations to include an advanced crash test dummy (the Test Device for Human Occupant Restraint (THOR) 50th percentile adult male) by requesting comment on specifying an additional spine configuration and an alternative to the face foam, and announcing the availability of additional documents. DATES: The documents referenced in this notification will be available in the docket as of September 22, 2026. You should submit your comments early enough to be received not later than October 22, 2026. ADDRESSES: You may submit comments electronically to the docket identified in the heading of this document by visiting the Federal eRulemaking Portal at https://www.regulations.gov . Follow the online instructions for submitting comments. Alternatively, you can file comments using the following methods: Mail: Docket Management Facility: Docket Management, U.S. Department of Transportation, 1200 New Jersey Avenue SE, West Building, Suite W58-213, Washington, DC 20590. Hand Delivery or Courier: Docket Management, U.S. Department of Transportation, 1200 New Jersey Aven…