▁Author ity , ▁ ▁was ▁a ▁Major ▁In vest ment ▁Study ▁that ▁looked ▁at ▁public ▁transport ation ▁ideas ▁for ▁the ▁New ▁York ▁metropol itan ▁area . ▁It ▁found ▁that ▁long - term ▁goals ▁would ▁best ▁be ▁met ▁by ▁better ▁connections ▁to ▁and ▁in - between ▁the ▁region ' s ▁major ▁rail ▁stations ▁in ▁Mid town ▁Manh attan , ▁P enn ▁Station ▁and ▁Grand ▁Central ▁Terminal . ▁The ▁East ▁Side ▁Access ▁project , ▁including ▁t unn els ▁under ▁the ▁East ▁River ▁and ▁the ▁East ▁Side ▁of ▁Manh attan , ▁which ▁would ▁di vert ▁some ▁L IR R ▁traffic ▁to ▁Grand ▁Central , ▁is ▁expected ▁to ▁be ▁completed ▁in ▁December ▁ 2 0 2 2 . ▁ ▁The ▁Trans - H ud son ▁Express ▁T unnel ▁or ▁THE ▁T unnel , ▁which ▁later ▁took ▁on ▁the ▁name ▁of ▁the ▁study ▁itself , ▁was ▁meant ▁to ▁address ▁the ▁western , ▁or ▁Hudson ▁River , ▁crossing . ▁Engineering ▁studies ▁determined ▁that ▁struct ural ▁inter ferences ▁made ▁a ▁new ▁terminal ▁connected ▁to ▁Grand ▁Central ▁or ▁the ▁current ▁P enn ▁Station ▁un fe as ible ▁and ▁its ▁final ▁design ▁involved ▁b oring ▁under ▁the ▁current ▁rail ▁yard ▁to ▁a ▁new ▁deep ▁ca vern ▁terminal ▁station ▁under ▁ 3 4 th ▁Street . ▁Am tra k ▁had ▁acknowled ged ▁that ▁the ▁region ▁represented ▁a ▁bott l ene ck ▁in ▁the ▁national ▁system ▁and ▁had ▁originally ▁planned ▁to ▁complete ▁work ▁by ▁ 2 0 4 0 . ▁ ▁The ▁AR C ▁project , ▁which ▁did ▁not ▁include ▁direct ▁Am tra k