Jun 13, 2016 at 01:31 PM CST
FRESNO, Calif. (CN) — California air regulators created an uneven playing field when they eased up on air-quality regulations for smaller operators of heavy-duty diesel trucks, a state judge ruled.
Postponing deadlines for smaller firms to upgrade to cleaner engines or install better pollution controls was unfair to trucking companies that already spent millions of dollars to comply with new regulations designed to clean up diesel emissions, Fresno County Judge Mark Snauffer ruled on June 7.
The California Air Resources Board in 2008 adopted the nation's toughest diesel emissions regulations, to get older trucks off the road and reduce health risks from soot and smog. The board relaxed the rules in 2010 and 2014.