The vehicles are what the California Air Resources Board calls "heavy, heavy-duty" buses and trucks -like semis and dump trucks that can haul more than 26,000 pounds. Such trucks with engines made from 2000-to-2004 will be required to have soot filters for the new year.
Bruce Tuter is with the California Air Resources Board. He's in Southern California this week trying to get the word out, "Places such as border crossings like we are now, where we're getting out-of-state trucks coming in. Maybe we're at ag stations -again, out of state trucks, or where we know the need for education is the greatest."