Diesel truck emissions in Oakland fall sharply
01/17/12 Institute of Transportation Studies — Recent field studies conducted by UC Berkeley civil and environmental engineering professor Robert Harley and his research team show that emissions of unhealthy pollutants from diesel trucks in West Oakland have been reduced by half in a matter of months, as a result of state regulations that banned the oldest, dirtiest trucks and set deadlines for retrofitting middle-aged trucks with diesel particle filters.