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I'm gonna post some shitty shoops of Variotrams, because someone online said something along the lines "what if we bidirectionalized them and then used them as reserve cars on the future light rail lines where the geometry is better and the cars should last".
He was shit down quickly, but these were made.
Suggestion A: turn the door units around and permanently link them back-to-back. Estimated lenght: 50 m.