2127-AL11 201210 The Regulatory Plan and the Unified Agenda of Federal Regulatory and Deregulatory Actions 2127 National Highway Traffic Safety Administration NHTSA 2100 Department of Transportation DOT FMVSS No. 121, Air Brake Systems; Response to Petition for Reconsideration This rulemaking would respond to a petition for reconsideration of a July 27, 2011 final rule. In response to earlier petitions, the agency made small adjustments to the new stopping distance requirements for truck tractors when tested from initial speeds below 60 mph. In this new petition, the petitioners ask for (1) additional lengthening of the lower initial speed stopping distance requirements for non-typical truck tractors, and (2) that stopping distance requirements for 20 and 25 mph initial speeds be removed from the standard, since they do not apply to any truck tractors. Granting or denying the first requested change would have little to no associated costs. Granting or denying the second requested change would have no associated costs. Substantive, Nonsignificant First Time Published in The Unified Agenda Final Rule Stage No No 49 CFR 571.121 49 USC 30111 49 USC 30115 49 USC 30117 49 USC 30166 49 USC 322 delegation of authority at 49 CFR 1.50 No Final Action 04/00/2013 No No None No www.regulations.gov www.regulations.gov No No 2127-AK84 Related to George Soodoo 2127 National Highway Traffic Safety Administration NHTSA 202 366-2720 202 366-4329 george.soodoo@dot.gov 1200 New Jersey Avenue, SE, Washington DC 20590