IIJA mandates passive impaired‑driving tech
- NHTSA has not ordered cameras in every new car by 2027; it is still writing an impaired-driving rule Congress told it to finish. - The statute set a November 2024 deadline for a final standard, but NHTSA said timing can slip if no rule meets safety-law requirements. - The fight now is over what counts as “passive” detection and whether any eventual system monitors drivers continuously. (nhtsa.gov)
Congress told the Transportation Department to write a rule requiring new cars to have impaired-driving prevention technology, but that rule still does not exist. (congress.gov) (nhtsa.gov) The mandate is in Section 24220 of the 2021 Infrastructure Investment and Jobs Act, which says the secretary “shall issue a final rule” within three years of enactment. The law covers passenger motor vehicles built after the rule’s effective date, not every car already on the road. (congress.gov) (nhtsa.gov) That three-year clock pointed to November 2024. NHTSA did not publish a final rule by then and instead opened an advance notice of proposed rulemaking in the Federal Register on January 5, 2024. (federalregister.gov) (nhtsa.gov) The agency’s own reports say the deadline can move if the secretary determines no standard can yet satisfy the federal vehicle-safety law in 49 U.S.C. 30111. In other words, Congress set a target, but the law itself built in an escape hatch. (nhtsa.gov 1) (nhtsa.gov 2) The basic idea is passive detection: a system that can stop a drunk or otherwise impaired driver from operating a vehicle without requiring a breath test every trip. NHTSA’s 2024 notice discussed two broad paths, including direct alcohol measurement and indirect monitoring of driver behavior. (federalregister.gov) (nhtsa.gov) Direct measurement means the car tries to detect alcohol concentration, such as through touch-based sensors. Indirect measurement means the car watches for signs like steering, lane-keeping, or eye and head behavior that suggest impairment. (nhtsa.gov 1) (nhtsa.gov 2) That distinction is why online claims about a 2027 camera mandate overstate what the government has actually done. NHTSA has not adopted a final technical design, and its public documents describe multiple possible approaches rather than one required package of cameras and sensors. (nhtsa.gov) (federalregister.gov) The safety case is large. NHTSA says 12,429 people died in 2023 crashes involving at least one driver with a blood alcohol concentration of 0.08 or higher, about 30 percent of all U.S. traffic deaths. (nhtsa.gov) The political backlash is also real. House Republicans introduced H.R. 1137, the “No CARS Act,” on February 7, 2025, to repeal Section 24220 outright. (congress.gov) Separate social-media posts tying this car rule to Federal Aviation Administration funding fights are mixing different policy tracks. Sean Duffy’s Transportation Department has promoted a separate air-traffic-control modernization plan that includes replacing 618 radars and upgrading communications at more than 4,600 sites. (transportation.gov) (faa.gov) So the clean version is this: Congress ordered an impaired-driving standard, NHTSA is still in the rulemaking stage, and no final federal requirement yet tells automakers to install a specific in-cabin camera system by 2027. (federalregister.gov) (nhtsa.gov)
