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A diesel particulate trap system using two (2) monolithic ceramic filters and a diesel burner was designed for the 6V-92TA 2-stroke bus engine. The system comprises an electronic controller which controls four (4) valves to direct exhaust flow and burner heat flow. The exhaust passes through one filter, while trapped particulate is being regenerated in the other. The burner control sequence was optimized to avoid overheating of the system components and thermal shock of the traps. The system was tested for 100 hours in a test cell, using the New York Bus Cycle. Engine backpressure showed no noticeable increases from the baseline. The need to reduce particulate emissions from transit coach engines in the U.S.A. is driven by two forces.