manormortal t1_jc6kvkq wrote
Reply to comment by ChrisFromLongIsland in More than 20% of LIRR trains can’t fit into Grand Central Madison tunnel by Nscience
>The tunnel used by trains going to Grand Central Madison was completed in the early 1970s, but it's too small for the LIRR’s diesel trains. The tube runs between Long Island City and East 63rd Street, carrying subway trains on its upper level and LIRR trains on the lower level.
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