S. 1779 — LOCOMOTIVES Act

This section revises Clean Air Act Section 209(e)(1), which preempts states from adopting emissions standards for new federally regulated nonroad engines or vehicles used in construction or farm equipment under 175 horsepower or in locomotives, by removing the "new" limitation; clarifying that such engines and vehicles must be subject to federal regulation; and adding locomotives or engines used in locomotives (other than those previously covered) that are engaged in commerce (i.e., providing common carrier railroad transportation for compensation pursuant to 49 U.S.C. §10102). (Thus, the preemption now applies to existing locomotives and engines in interstate rail service.)