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BourbonCoug t1_itqz8k9 wrote

Why do all of the newly-constructed Silver Line stations have center platforms whereas this new infill station will have platforms on the sides of the tracks?

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nullptr-exception t1_itr712t wrote

This new station couldn’t use a center platform unless you relocated the tracks to split around it (which is $$$)

The new Silver Line stations are built from scratch and there are advantages to a center platform over side platforms.

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DeepSeaDweller t1_its35sr wrote

This station did involve relocation of tracks, it's slightly to the east of the old alignment.

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MidnightSlinks t1_itr77o9 wrote

I think it has to do with how much use they expect the station to get at peak. It seems likely that an infill station in Alexandria would be used more than an outer silver line station and would get dual direction use during rush as it's both an origin and a destination station, so it gets a split platform so you don't have to worry about crowding from two directions.

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SandBoxJohn t1_itubu3e wrote

An island platform station would have required a larger land area foot print, as the track would have needed to taper away from each other beyond both end of the station. The foot print for the double crossover alone would have been roughly 2/3 the length of the foot print of an island platform station.

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