OUR COMPANY HAS A FLEET OF 2004 FREIGHTLINERS COLUMBIA CABS SEMI-TRACTORS, WHILE I WAS IN OUR REPAIR SHOP THIS LAST WEEKEND, THEY HAD A TRUCK ISOLATED, BECAUSE A DRIVER HAD DIED IN IT. COD HAS NOT BEEN DETERMINED AT THIS POINT. WE HAVE HAD SEVERAL ROLLOVER ACCIDENTS IN THESE TRUCKS, AND I HAVE TALKED TO NUMEROUS DRIVERS ABOUT EXHAUST LEAKS. OUR COMPANY IS NOW IN THE PROCESS OF INSTALLING CARBON MONOCIDE DETECTORS IN THESE NEW TRUCKS. MY CONCERN IS, HOW MANY UNEXPLAINABLE ACCIDENTS ARE WE GONING TO HAVE BEFORE THESE PROBLEMS ARE RESOLVED. I DO NOT KNOW IF FREIGHTLINER IS MOVING FAST ENOUGH TO PREVENT FUTURE DEATHS AND ENDANGERMENT TO THE GENERAL PUBLIC. I HOPE THE NHTSA IS ALREADY AWARE OF THIS PROBLEM AND WORKING WITH THEM TO RESOLVE OR REMOVE THESE VEHICLES FROM OPERATIONS, UNTIL THE UNSAFE CONDITIONS ARE CORRECTED.*AK