To provide procedures for noise studies and noise abatement measures to help protect the public's health, welfare and livability, to supply noise abatement criteria, and to establish requirements for information to be given to local officials for use in the planning and design of highways approved pursuant to title 23 U.S.C.
source: 75 FR 39834, July 13, 2010, unless otherwise noted.
cite as: 23 CFR 772.1