▁projects ▁failed ▁on ▁cost ▁grounds . ▁After ▁the ▁App enz ell ▁Rail ways ▁( AB ) ▁merged ▁with ▁the ▁Tro gen ▁Railway ▁( TB ), ▁the ▁R or sch ach – He iden ▁railway ▁( R H B ) ▁and ▁the ▁R he ine ck – W al zen hausen ▁mountain ▁railway ▁( R h W ) ▁in ▁ 2 0 0 6 , ▁the ▁App enz ell ▁Rail ways ▁decided ▁to ▁increase ▁services ▁between ▁St . ▁G allen ▁and ▁Te ufen ▁to ▁ 1 5 - min ute ▁intervals . ▁This ▁required ▁the ▁short ening ▁of ▁the ▁travel ▁time ▁between ▁St . ▁G allen ▁and ▁Ri eth üs li , ▁which ▁was ▁only ▁possible ▁with ▁the ▁removal ▁of ▁the ▁ra ck ▁section ▁through ▁the ▁R uck hal de . ▁In ▁order ▁to ▁eliminate ▁the ▁une conom ical ▁service ▁pattern ▁of ▁the ▁trains ▁in ▁the ▁St . ▁G allen ▁" side " ▁station ▁( N eben bahn hof ) ▁needed ▁to ▁be ▁connected ▁to ▁the ▁App enz ell – St . ▁G allen ▁line ▁of ▁the ▁Tro gen ▁Railway ▁by ▁the ▁cross - city ▁line , ▁although ▁the ▁two ▁track ▁branches ▁had ▁very ▁different ▁characteristics . ▁▁ ▁The ▁App enz ell – St . ▁G allen – T ro gen ▁cross - city ▁line ▁became ▁a ▁key ▁strateg ic ▁project ▁of ▁App enz ell ▁Rail ways . ▁The ▁required ▁work ▁was ▁sub div ided ▁into ▁five ▁sub - projects , ▁of ▁which ▁the ▁St .   G allen ▁station – R i eth