California Adopts Emissions System for Big Trucks

Engine manufacturers must install computer systems on big-rig trucks operating in California to diagnose and warn drivers of emission problems, according to an order issued by state air quality regulators Thursday.

The order by the California Air Resources Board is the first such regulation in the United States for heavy-duty trucks.

The U.S. Environmental Protection Agency is expected to approve a similar rule to develop and install on-board diagnostic systems for diesel and gasoline engines, according to the California agency.

The Air Resources Board estimates the diagnostic system will cost $132 per truck.

ENN