The Munich S-Bahn connected 12 suburban lines with a 4.3km tunnel.
Costing $2.8 bn in today’s money, this relatively modest investment made it possible to run continuous train services across the entire network—more than 100x longer than the tunnel itself—because outer lines were already in place.
Costing $2.8 bn in today’s money, this relatively modest investment made it possible to run continuous train services across the entire network—more than 100x longer than the tunnel itself—because outer lines were already in place.
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It was also integrated with the U-Bahn metro system.
Despite this, Munich's U-bahn still runs relatively fast.
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