Why 11 platforms are needed at HS2’s Euston terminus

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Why 11 platforms are needed at HS2’s Euston terminus

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Why 11 platforms are needed at HS2’s Euston terminus
The logic behind that is simple enough – trains are to take turnrounds of 25 minutes so, with 5 minutes “Run out, run in” time between trains, the 18 trains per hour for which the railway is designed (albeit the business case nominates 17 paths per hour for use with the 18th for future growth) needs nine platforms. But 25 minutes is not adequate for the longest distance trains, from Glasgow and Edinburgh, so these ‘step down’ at Euston and are given 25 minutes plus a service interval – a total of 55 minutes. That adds a platform. Then have one more platform, so as not to be working the station to 100% of its capacity, 18 trains per hour, 18 hours a day. Total number of platform = 11...
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