The U.S. National Highway Traffic Safety Administration (NHTSA) has issued an update of its activities under a 1998 agreement to harmonize vehicle regulations throughout the  world and requests comments by May 16, 2014. Noting that any U.S. regulations emerging from the international activities will undergo formal rulemaking  procedures, NHTSA reports that global technical regulations (GTRs) under development before  international working groups include (i) GTR 9 on pedestrian safety, (ii) GTR 7 on head restraints, (iii) a GTR on alerts for quiet electric and hybrid-electric vehicles, (iv) a proposed GTR on the safety and environmental issues associated  with electric vehicles, (v) a GTR on tires for light vehicles, and (vi) a GTR for side-impact dummies. See Federal Register, April 16, 2014.