Trowse Bridge

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Trowse swing bridge is a single-track railway bridge which carries the Great Eastern Main Line over the River Wensum just outside Norwich in the United Kingdom at grid reference TG245076. It is notable for being the only swing bridge in the United Kingdom^{[citation needed]} to carry an overhead electrified railway railway track (25kV 50Hz). (Other examples can be found along the Northeast Corridor in the United States; see for instance Portal Bridge.) The overhead supply to trains is provided by a rigid bar rather than a wire, and there are short lengths of rigid bar either side of the bridge on the fixed approaches. Trains normally travel at quite low speeds over the bridge (because they are just about to arrive at, or have just departed from, Norwich).