▁Par ap ara um u ▁Station . ▁Network ▁extensions ▁beyond ▁the ▁current ▁Met link ▁rail ▁operation ▁limits ▁would ▁be ▁by ▁" sh utt les ▁or ▁non - elect r ified ▁services " ▁running ▁to ▁Well ington . ▁This ▁followed ▁a ▁campaign ▁to ▁extend ▁elect r ified ▁comm uter ▁services ▁to ▁Ot aki , ▁following ▁the ▁extension ▁of ▁the ▁Kap iti ▁Line ▁to ▁Wa ik ana e ▁in ▁ 2 0 1 1 . ▁ ▁Service ▁improvements ▁proposed ▁in ▁May ▁ 2 0 1 7 ▁are ▁double - track ing ▁the ▁line ▁between ▁Tr ent ham ▁and ▁Upper ▁H utt ; ▁a ▁third ▁platform ▁or ▁passing ▁loop ▁at ▁Por ir ua ▁Station ; ▁and ▁a ▁" turn back " ▁point ▁at ▁Pl imm erton ▁Station ▁so ▁that ▁trains ▁can ▁continue ▁in ▁the ▁opposite ▁direction ▁without ▁using ▁a ▁turn around ▁point . ▁These ▁will ▁ease ▁peak - hour ▁con g estion ▁and ▁allow ▁increased ▁trains ▁at ▁busy ▁times . ▁However , ▁they ▁are ▁regarded ▁by ▁Ki wi R ail ▁as ▁" service ▁enh anc ements " ▁rather ▁than ▁renew als / main ten ance ▁which ▁Ki wi R ail ▁would ▁pay ▁for , ▁so ▁the ▁G WR C ▁is ▁seeking ▁tax p ayer ▁fund ing ▁towards ▁the ▁$ 3 0 ▁million ▁cost , ▁before ▁inclusion ▁in ▁the ▁ 2 0 1 7 - 1 8 ▁Ann ual ▁Plan ▁as ▁Rail ▁Sc enario ▁ 1 . ▁Im mediate ▁work ▁required ▁first ▁is ▁replacement ▁of ▁some ▁tra ction ▁pol es ▁on ▁the ▁H utt ▁Line . ▁Ch