5 , ▁construction ▁work ▁on ▁the ▁Canal ▁line ▁was ▁focused ▁upon ▁the ▁building ▁of ▁extensive ▁carriage ▁sid ings ▁at ▁B ella hou ston , ▁as ▁well ▁as ▁an ▁engine ▁shed ▁at ▁nearby ▁C ork er hill . ▁The ▁avail ability ▁of ▁afford able ▁land ▁at ▁these ▁locations ▁had ▁rendered ▁such ▁schemes ▁much ▁more ▁econom ical , ▁but ▁came ▁at ▁the ▁exp ense ▁of ▁additional ▁empty ▁mile age . ▁ ▁Top ography ▁ ▁The ▁line ▁left ▁the ▁City ▁of ▁Glasgow ▁Union ▁Railway ▁( CG UR ) ▁at ▁Sh ield s ▁J unction ▁( at ▁the ▁point ▁where ▁the ▁CG UR ▁joined ▁the ▁joint ▁line ) ▁and ▁followed ▁a ▁course ▁south ▁of ▁that ▁route , ▁running ▁through ▁the ▁southern ▁part ▁of ▁P ais ley ▁Burg h ▁and ▁rejo ining ▁the ▁G & S WR ▁line ▁to ▁A yr ▁at ▁E ld ers lie . ▁As ▁the ▁CG UR ▁was ▁controlled ▁by ▁the ▁G & S WR , ▁G & S WR ▁passenger ▁trains ▁from ▁St ▁En och , ▁and ▁goods ▁trains ▁from ▁College , ▁could ▁reach ▁A yr ▁without ▁the ▁necessity ▁of ▁entering ▁on ▁any ▁part ▁of ▁the ▁joint ▁line . ▁Despite ▁the ▁eas ing ▁of ▁the ▁worst ▁curv ature , ▁the ▁new ▁Canal ▁Line ▁was ▁un su ited ▁to ▁fast ▁running ▁due ▁to ▁the ▁alignment . ▁A ▁loop ▁in ▁the ▁canal ▁was ▁used ▁to ▁hold ▁cool ing ▁water ▁for ▁the ▁cot ton ▁thread ▁mill s ▁at ▁Fer g us lie . ▁ ▁At ▁E ld ers lie ▁J unction ▁it ▁ran ▁alongside ▁the ▁Glasgow