A catenary maintenance vehicle (also known as a tower wagon or tower car) is a railroad maintenance of way vehicle that is used to maintain and inspect overhead line (also known as catenary) on electrified railroad or metro tracks. Such vehicles are typically self-propelled by a diesel engine, to allow them to operate when power is shut off to the overhead lines for worker safety or in the event of a power failure. Catenary maintenance vehicles allow maintenance of way workers to safely work on overhead wires and typically include a crane to install or remove wires as needed.
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