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@FrankIBC:
You are incorrect. All of the tunnels in Baltimore have 2 tracks. In fact, the entire Northeast Corridor is at least double-tracked all the way from Washington to Boston.

@Payton:
The NextGen HSR proposed to be added to the station as part of Phase 4 will have a tunnel extending to the Anacostia River, but it's not because of bottlenecks.

The NextGen HSR will operate on exclusive tracks. It will essentially be a new HSR line built on a parallel alignment to the NEC. So even if there were a bottleneck between Union Station and the Anacostia on the NEC (there isn't), it wouldn't matter, because those trains won't be using the NEC, they'll be using their own tracks.

The real reason for the tunnel is likely geometry: To allow the track to be as straight as possible and to avoid mixing with local and regional trains in Washington Terminal.

by Matt Johnson on Jul 26, 2012 10:30 am • link • report

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