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Officials at the Port of Los Angeles are crediting their clean trucks program for significantly lowering diesel emissions in 2009.

Officials at the Port of Los Angeles are crediting their clean trucks program, which resulted in significant turn-over of older trucks to newer and cleaner trucks, for significantly lowering port-wide diesel emissions in 2009.

After facing off in federal court in Los Angeles last month, attorneys for American Trucking Associations and the Port of Los Angeles are expected to file their final post-trial briefs this week in the contentious court dispute over parts of the port’s clean trucks program.