▁This ▁would ▁have ▁required ▁the ▁construction ▁of ▁a ▁ 6 . 2 - km - long ▁tunnel ▁through ▁the ▁Cha um ont ▁r idge ▁and ▁a ▁ 5 . 7 - km - long ▁tunnel ▁under ▁the ▁Vue ▁des ▁Al pes . ▁Tra ins ▁would ▁have ▁crossed ▁In ▁the ▁interven ing ▁open ▁section ▁at ▁a ▁station ▁in ▁C ern ier . ▁ ▁Oper ations ▁▁▁ ▁Since ▁ 1 3 ▁December ▁ 2 0 1 5 , ▁a ▁Reg io Express ▁and ▁a ▁Reg io ▁service ▁have ▁run ▁every ▁hour ▁between ▁Ne uch ât el ▁and ▁La ▁Ch aux - de - F onds ▁through ▁the ▁stations ▁of ▁ ▁Cor cell es - P ese ux , ▁Cham bre li en ▁and ▁Les ▁Gene ve ys - sur - C off rane ▁at ▁exactly ▁half - hour ▁intervals . ▁The ▁RE ▁trains ▁run ▁between ▁Bern ▁and ▁La ▁Ch aux - de - F onds . ▁There ▁are ▁operated ▁with ▁E W ▁III ▁push - pull ▁trains ▁of ▁the ▁B LS ▁power ed ▁by ▁class ▁Re ▁ 4 6 5 ▁locomot ives . ▁Regional ▁trains ▁continue ▁via ▁La ▁Ch aux - de - F onds ▁to ▁Le ▁Loc le . ▁▁ ▁Between ▁La ▁Ch aux - de - F onds ▁and ▁Le ▁Loc le , ▁the ▁service ▁is ▁complement ed ▁by ▁a ▁second ▁hour ly ▁regional ▁service . ▁The ▁stops ▁in ▁the ▁lower ▁section ▁are ▁served ▁by ▁half - hour ▁Reg io ▁services ▁on ▁the ▁Ne uch ât el – Cor cell es - P