Stray current corrosion has been a serious problem since the late 1800's when rail mass transit systems started operating in the U.S.A. The measures implemented to control these stray currents have included solutions that range from simple to technically complex. This paper will review the stray current control measures that have been implemented over the years to control or minimize the corrosive effects from rail transit operations. A review of today's state-of-the-art methods which are being implemented will also be discussed.

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