EPA, INDUSTRY PROPOSE PLAN TO MEASURE IN-USE DIESEL EMISSIONS

EPA is taking comment on a long-awaited proposal to require engine manufacturers to conduct in-use emissions testing of heavy-duty diesel trucks. The plan stems from a 1998 consent decree between EPA and engine makers after the agency accused them of installing "defeat devices" that allowed trucks to pass emissions tests in the laboratory but circumvent the limits on the road. The June 3 proposal establishes a portable test to ensure that the trucks do not release emissions higher than EPA's...