Abstract
As a part of the overall Urban Rail Supporting Technology Program, the U.S. Department of Transportation (DOT) Urban Mass Transit Administration (UMTA) has sponsored a program of in‐service testing and evaluation of four noise control treatments applied to an existing rail transit facility. Rail grinding, wheel truing, resilient wheels, and damped wheels were applied to selected rail sections and vehicles of the Southeastern Pennsylvania Transit Authority (SEPTA) and the resulting noise reductions were evaluated initially, at an interim point, and after 112 years of normal operation. Measurements included car interior noise, wayside noise and ground‐borne vibration. The final tests and analyses have now been completed. One result is the determination that design of such a testing program must include prior knowledge of the transit vehicle noise characteristics in order to devise appropriate tests for evaluation of the full effectiveness of the noise reduction procedures in reducing wheel/rail noise. Results of the complete testing program are presented.
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