Hundreds of protesting truck drivers slowed traffic Friday on the 710 Freeway and blasted their horns while driving past Los Angeles City Hall to draw attention to new environmental rules they say threaten their livelihoods. More than 400 truckers protested new restrictions in the year-old Clean Truck Program, a pollution-reduction effort credited with cutting diesel truck emissions by 70% at the Port of Los Angeles and a similar amount at the Port of Long Beach. Starting Jan. 1, all trucks built before 1994 will be barred from the ports, as will trucks built from 1994 to 2003 that have not been retrofitted to reduce emissions.
