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Reference information: Rubber-Tyred Metros - metrobits.org
The engineers in Paris came to the conclusion that the rubber-tyred system had ... but also backup steel wheels and rubber-tyred horizontal guiding wheels. Trains run on a concrete surface with auxiliary steel rails. Today, five metro lines run on rubber. ... Page updated 1 May 2011 (database entries may be more recent).
polyglot45 Native speaker of: English, French PRO pts in category: 192