, ▁and ▁for ▁the ▁line ▁to ▁be ▁operated ▁in ▁two ▁sections . ▁ ▁In ▁June ▁ 2 0 0 5 , ▁the ▁Can ars ie ▁Line ▁ran ▁full - length ▁ ▁trains ▁with ▁a ▁single ▁operator ▁on ▁week ends . ▁However , ▁as ▁this ▁was ▁a ▁viol ation ▁of ▁union ▁contract s ▁– ▁which ▁st ip ulated ▁that ▁there ▁must ▁be ▁one ▁operator ▁per ▁ ▁of ▁train ▁– ▁the ▁M TA ▁was ▁ordered ▁to ▁res ume ▁two - person ▁operation ▁at ▁all ▁times . ▁ ▁The ▁system ▁became ▁oper ational ▁. ▁Autom ation ▁was ▁achieved ▁with ▁the ▁R 1 4 3 s ▁assigned ▁exclus ively ▁to ▁the ▁L , ▁but ▁since ▁the ▁R 1 6 0 As ▁were ▁not ▁C B TC - compatible ▁until ▁August ▁ 2 0 1 0 , ▁some ▁trains ▁were ▁manually ▁operated ▁alongside ▁automatically ▁driven ▁trains . ▁The ▁L ▁fully ▁began ▁automatic ▁train ▁operation ▁in ▁early ▁ 2 0 1 2 . ▁The ▁C B TC ▁installation ▁increased ▁the ▁train ▁capacity ▁on ▁the ▁line ▁from ▁ 2 0 ▁trains ▁per ▁hour ▁( t ph ) ▁to ▁ 2 4 ▁t ph , ▁as ▁well ▁as ▁permitted ▁the ▁installation ▁of ▁count down ▁clock s , ▁which ▁show ▁the ▁amount ▁of ▁time ▁until ▁the ▁next ▁train ▁arriv es . ▁▁ 1 4 th ▁Street ▁T unnel ▁shut down ▁▁ ▁In ▁January ▁ 2 0 1 6 , ▁the ▁B MT ▁Can ars ie ▁Line ▁between ▁Bed ford ▁and ▁E ighth ▁Aven ues ▁was ▁proposed ▁for ▁a ▁partial ▁or ▁full ▁shut