9 8 6 , ▁the ▁line ▁was ▁converted ▁to ▁automatic ▁operation . ▁In ▁ 1 9 9 0 , ▁the ▁line ▁became ▁part ▁of ▁the ▁z onal ▁tar iff ▁structure ▁of ▁the ▁Zür cher ▁Verkehr s ver bund ▁( Z V V ), ▁and ▁in ▁ 1 9 9 4 ▁self - service ▁ticket ing ▁was ▁introduced , ▁with ▁ticket ▁machines ▁at ▁both ▁stations . ▁In ▁ 1 9 9 7 , ▁the ▁drive ▁and ▁bra ke ▁systems ▁were ▁replaced . ▁ ▁The ▁line ▁celebrated ▁its ▁ 5 0 th ▁anni versary ▁in ▁ 2 0 0 4 , ▁when ▁a ▁complete ▁renew al ▁was ▁planned ▁according ▁to ▁the ▁conditions ▁for ▁the ▁license ▁given ▁by ▁the ▁Swiss ▁government . ▁The ▁renew al ▁cost ▁ 3 . 5 ▁million ▁Swiss ▁fran cs , ▁which ▁was ▁fin anced ▁by ▁the ▁municipality ▁of ▁Ad lis w il , ▁the ▁city ▁of ▁Zürich ▁( 3 0 0 , 0 0 0 ▁each ), ▁the ▁Z V V ▁( 2 ▁million ), ▁and ▁by ▁public ▁fund ra ising ▁and ▁spons or ship . ▁The ▁renew al ▁included ▁the ▁control ▁and ▁monitoring ▁system , ▁whilst ▁the ▁cab ins ▁were ▁replaced ▁by ▁more ▁comfortable , ▁sp a cious ▁and ▁" s le ek " ▁cab ins ▁constructed ▁by ▁C WA ▁Const ru ctions ▁SA . ▁The ▁m asts ▁and ▁carrying ▁ro pes ▁were ▁strength ened , ▁and ▁both ▁the ▁valley ▁and ▁mountain ▁stations ▁renew ed . ▁The ▁renew al ▁took ▁place ▁between ▁February ▁ 4 ▁and ▁ 3 0 ▁April