James Howard: actually one of the points made in the documents under discussion here is an admission that the capacity of the Loop Line following resignalling will effectively be more like 15 to 17 TPH rather than the promised 20. This apparently is because of (a) limitations arising from turnback activity at GCD and (b) the plethora of level crossings between Lansdowne Road and Merrion which would be a constraint even in the absence of turnbacks.
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