- s and ing ▁with ▁salt . ▁Salt ed ▁water ▁often ▁came ▁into ▁contact ▁with ▁elect rical ▁w iring ▁and ▁caused ▁short ▁circ uits . ▁Sometimes ▁the ▁entire ▁body ▁of ▁a ▁t rol ley bus ▁was ▁energ ised ▁with ▁electric ity . ▁Pass engers ▁often ▁experienced ▁shock ▁if ▁they ▁touched ▁metal ▁parts ▁of ▁the ▁vehicle . ▁The ▁last ▁t rol ley bus ▁vehicle ▁in ▁L jub lj ana ▁drove ▁on ▁September ▁ 4 , ▁ 1 9 7 1 ▁on ▁line ▁no . ▁ 1 . ▁On ▁the ▁next ▁day , ▁t rol ley bus ▁line ▁was ▁completely ▁replaced ▁by ▁bus es . ▁ ▁Bus ▁era ▁( 1 9 5 0 – today ) ▁ ▁The ▁ 1 9 6 0 s ▁and ▁ 1 9 7 0 s ▁brought ▁un im ag ined ▁development ▁of ▁urban ▁public ▁transport ▁and ▁the ▁company , ▁which ▁was ▁renamed ▁Vi ator ▁in ▁ 1 9 7 1 , ▁gradually ▁expanded ▁its ▁operations ▁throughout ▁Sloven ia . ▁Urban ▁transport ▁operations ▁developed ▁into ▁other ▁services ▁such ▁as ▁long ▁distance ▁passenger ▁transport , ▁fre ight ▁and ▁tour ist ▁traffic , ▁which ▁boost ed ▁tour ist ▁ag encies ' ▁activities , ▁and ▁then ▁continued ▁with ▁the ▁construction ▁of ▁lif ts ▁to ▁mountains ▁such ▁as ▁Vog el , ▁the ▁Big ▁Past ure ▁Pl ate au , ▁and ▁Z atr nik . ▁From ▁transport ▁and ▁tour ism ▁it ▁was ▁only ▁one ▁step ▁to ▁c ater ing ▁and ▁tax i ▁services . ▁Since ▁ 1 9 7 1 , ▁public ▁transport ation ▁was