▁track ▁in ▁the ▁ 1 8 6 0 s , ▁but ▁were ▁sing led ▁in ▁the ▁ 1 9 3 0 s ▁and ▁first ▁de cade ▁of ▁the ▁ 2 1 st ▁century ▁respectively . ▁The ▁north - east ▁line ▁to ▁Se ym our ▁was ▁dup licated ▁in ▁the ▁mid - 1 8 8 0 s ▁and ▁remains ▁so ▁today , ▁the ▁Gi pp s land ▁line ▁to ▁Mo e ▁was ▁dup licated ▁in ▁the ▁ 1 9 5 0 s ▁in ▁conj unction ▁with ▁increased ▁b ri qu ette ▁traffic , ▁and ▁the ▁bus iest ▁country ▁line ▁in ▁the ▁state ▁to ▁Ge el ong ▁was ▁progress ively ▁dup licated ▁from ▁ 1 9 5 9 ▁to ▁ 1 9 8 1 . ▁ ▁F ew ▁railway ▁t unn els ▁exist ▁in ▁Victoria , ▁with ▁the ▁exception ▁of ▁the ▁Melbourne ▁City ▁Loop . ▁The ▁longest ▁tunnel ▁before ▁the ▁opening ▁of ▁the ▁loop ▁was ▁on ▁the ▁F y ans ford ▁C ement ▁Works ▁Railway ▁( near ▁Ge el ong ), ▁where ▁a ▁ 1 3 0 0 - met re - long ▁tunnel ▁existed ▁on ▁a ▁narrow ▁gauge ▁quar ry ▁railway . ▁Of ▁those ▁open ▁today ▁the ▁longest ▁is ▁the ▁single ▁track ▁ 4 2 2 - met re ▁long ▁Ge el ong ▁T unnel , ▁followed ▁by ▁the ▁double ▁track ▁ 3 8 5 - met re ▁El ph inst one ▁and ▁the ▁ 3 9 0 - met re - long ▁Big ▁Hill ▁T unn els ▁on ▁the ▁B end igo ▁line