▁express ▁service ▁operating ▁in ▁the ▁ ▁load ▁direction ▁between ▁App enz ell ▁and ▁St . ▁G allen ▁in ▁the ▁peak . ▁The ▁regular ▁interval ▁regional ▁services ▁run ▁on ▁the ▁App enz ell – T ro gen ▁route ▁as ▁line ▁S   2 1 ▁and ▁on ▁the ▁Te ufen – T ro gen ▁route ▁as ▁line ▁S   2 2 . ▁The ▁services ▁previously ▁operated ▁in ▁the ▁evening ▁by ▁bus ▁are ▁provided ▁by ▁trains . ▁The ▁two ▁minutes ▁reduction ▁in ▁running ▁time ▁enabled ▁by ▁the ▁R uck hal de ▁T unnel ▁required ▁the ▁extension ▁of ▁the ▁Lie beg g ▁crossing ▁loop ▁to ▁the ▁L ust m ühle ▁halt . ▁The ▁other ▁crossing ▁loops ▁on ▁the ▁G ais ▁branch ▁are ▁located ▁at ▁St . ▁G allen ▁fre ight ▁yard , ▁Nieder te ufen , ▁Te ufen ▁and ▁G ais . ▁▁ ▁Since ▁the ▁opening ▁of ▁the ▁R uck hal de ▁T unnel , ▁all ▁traffic ▁has ▁been ▁handled ▁by ▁eleven ▁ 2 . 4 0 ▁met re - wide ▁T ango ▁art ic ulated ▁rail car ▁( class ▁A Be ▁ 8 / 1 2 ), ▁which ▁is ▁determined ▁by ▁the ▁structure ▁gauge ▁of ▁the ▁Tro gen ▁Railway . ▁The ▁rolling ▁stock ▁previously ▁used ▁on ▁the ▁St . ▁G allen – App enz ell ▁route ▁are ▁ 2 5 ▁cent imet res ▁wider . ▁Major ▁maintenance ▁work ▁will ▁ensure ▁that ▁ 2 . 6 5 ▁met re - wide ▁vehicles ▁can ▁be ▁used ▁for ▁the ▁next ▁generation ▁of ▁rolling ▁stock . ▁ ▁Project s ▁