Eng el berg ▁line . ▁ ▁History ▁▁ ▁The ▁line ▁was ▁constructed ▁by ▁the ▁J ura – B ern – L uc erne ▁Railway ▁( J BL ), ▁which ▁opened ▁the ▁section ▁between ▁B ri enz ▁over ▁the ▁Br ün ig ▁Pass ▁to ▁Al pn ach stad ▁in ▁ 1 8 8 8 . ▁Initial ly , ▁the ▁line ▁connected ▁to ▁steam ships ▁on ▁Lake ▁B ri enz ▁and ▁Lake ▁Luc erne , ▁but ▁was ▁extended ▁in ▁ 1 8 8 9 ▁from ▁Al pn ach stad ▁to ▁Luc erne , ▁giving ▁connections ▁to ▁the ▁rest ▁of ▁the ▁Swiss ▁railway ▁network . ▁In ▁ 1 8 9 1 , ▁J BL ▁became ▁part ▁of ▁the ▁J ura – Sim pl on ▁Railway ▁( JS ). ▁ ▁In ▁ 1 9 0 3 , ▁the ▁JS ▁became ▁part ▁of ▁the ▁Swiss ▁Federal ▁Rail ways ▁( SB B ). ▁Only ▁in ▁ 1 9 1 6 ▁did ▁the ▁last ▁section ▁of ▁the ▁current ▁line , ▁between ▁B ri enz ▁and ▁Inter la ken , ▁open . ▁This ▁allowed ▁through ▁trains ▁to ▁operate ▁from ▁Luc erne ▁to ▁Inter la ken , ▁and ▁provided ▁an ▁easy ▁inter change ▁with ▁trains ▁to ▁Bern ▁and ▁beyond . ▁ ▁The ▁line ▁was ▁elect r ified ▁in ▁ 1 9 4 1 ▁and ▁ 1 9 4 2 , ▁using ▁the ▁standard ▁Swiss ▁main ▁line ▁system ▁of ▁ ▁supplied ▁by ▁overhead ▁line . ▁The ▁elect r ification ▁lead ▁to ▁a ▁significant ▁acceleration ▁of ▁services , ▁with ▁typical ▁through ▁journey ▁times ▁reduced