▁is ▁one ▁connected ▁to ▁Sh on and ai ▁at ▁the ▁Nag at ani ▁station ▁on ▁the ▁end ▁of ▁the ▁terminal ▁by ▁the ▁train ▁which ▁goes ▁to ▁Nag at ani ▁on ▁a ▁week day , ▁six ▁on ▁a ▁Saturday ▁hol iday , ▁and ▁the ▁Az am ino ▁departure . ▁Although ▁Blue ▁is ▁mainly ▁used ▁in ▁the ▁direction ▁cur tain ▁display ▁of ▁the ▁vehicle ▁and ▁the ▁guidance ▁of ▁the ▁station ▁campus , ▁it ▁is ▁not ▁necessarily ▁un ited ▁in ▁case ▁of ▁green . ▁ ▁One - man ▁operation ▁ ▁One - man ▁operation ▁has ▁been ▁carried ▁out ▁since ▁December ▁ 1 5 , ▁ 2 0 0 7 . ▁As ▁a ▁result , ▁a ▁set ▁of ▁platform ▁screen ▁doors ▁was ▁installed ▁at ▁each ▁station ▁beginning ▁in ▁February ▁ 2 0 0 7 , ▁and ▁the ▁operation ▁started ▁from ▁April ▁of ▁that ▁year . ▁ ▁Prior ▁to ▁this , ▁automatic ▁operation ▁by ▁A TO ▁began ▁from ▁January ▁ 2 0 , ▁ 2 0 0 7 . ▁Before ▁starting ▁the ▁one - man ▁operation , ▁door ▁opening ▁and ▁closing ▁is ▁performed ▁by ▁a ▁button ▁on ▁the ▁cab ▁that ▁is ▁pushed ▁by ▁the ▁operator ▁rather ▁than ▁the ▁conduct or . ▁ ▁The ▁P SD s ▁were ▁originally ▁scheduled ▁to ▁start ▁operations ▁in ▁February ▁ 2 0 0 7 , ▁but ▁the ▁adjust ment ▁was ▁delayed ; ▁they ▁began ▁operating ▁at ▁Az am ino ▁on ▁April ▁ 7 ▁and ▁started ▁to ▁be ▁used ▁at ▁all ▁stations ▁on ▁September ▁ 1 5 , ▁ 2 0 0 7 .