▁the ▁Roman ov s ▁to ▁design ▁the ▁vi ad uct ▁over ▁the ▁T sem ist sk h ali ▁River ▁between ▁the ▁stations ▁of ▁Ts agh ver i ▁and ▁T sem i . ▁ ▁Origin ally , ▁trains ▁were ▁pulled ▁by ▁a ▁steam ▁engine ▁of ▁the ▁" P orter " ▁type , ▁imported ▁from ▁America , ▁and ▁passengers ▁travel led ▁in ▁open ▁carri ages ▁protected ▁by ▁hand rails . ▁The ▁line ▁was ▁elect r ified ▁in ▁ 1 9 6 6 , ▁when ▁the ▁small ▁steam ▁engine ▁was ▁replaced ▁by ▁an ▁electric ▁" c roc od ile " ▁locomot ive ▁made ▁by ▁the ▁Š k oda ▁works ▁in ▁Czech oslov ak ia . ▁ ▁The ▁line ▁is ▁currently ▁operated ▁by ▁Bor j omi – B ak ur iani ▁Railway ▁L LC ▁( BB R ), ▁a ▁subs idi ary ▁of ▁Georg ian ▁Rail ways . ▁ ▁Although ▁the ▁line ▁was ▁until ▁ 1 9 9 1 ▁also ▁used ▁to ▁transport ▁and es ite ▁from ▁a ▁mine ▁near ▁Bak ur iani , ▁the ▁K uk ush ka ▁is ▁now ▁exclus ively ▁a ▁passenger ▁service ▁used ▁by ▁tour ists ▁and ▁local ▁residents . ▁Tra vel ▁time ▁is ▁ 2 . 5 ▁hours ▁( aver age ▁speed ▁ 1 5   km / h ), ▁and ▁there ▁are ▁two ▁trains ▁a ▁day ▁in ▁each ▁direction . ▁Connection ▁to ▁T bil isi ▁is ▁ens ured , ▁but ▁not ▁vice ▁vers a . ▁ ▁References ▁▁ ▁Category : R ail way ▁lines ▁in ▁Georgia ▁( country ) ▁Category :