▁thought ▁of ▁in ▁the ▁most ▁remote ▁manner , ▁till ▁they ▁saw ▁it ▁in ▁the ▁newspaper ." ▁In ▁the ▁Chair man ' s ▁own ▁words , ▁the ▁suggestion ▁of ▁such ▁a ▁conversion : ▁" was ▁perfect ▁n ons ense ". ▁ ▁Cong estion ▁on ▁the ▁joint ▁line ▁By ▁this ▁time , ▁the ▁Glasgow ▁and ▁South ▁Western ▁Railway ▁( G & S WR ) ▁possessed ▁an ▁oper ational ▁main ▁line ▁between ▁A yr ▁and ▁Carl is le ; ▁but ▁the ▁first ▁section ▁of ▁the ▁A yr ▁line ▁was ▁over ▁the ▁Glasgow ▁and ▁P ais ley ▁joint ▁line . ▁Under ▁this ▁structure , ▁it ▁was ▁operated ▁by ▁a ▁J oint ▁Committee , ▁which ▁was ▁answer able ▁to ▁both ▁the ▁G & S WR ▁and ▁its ▁rival , ▁the ▁C aled onian ▁Railway . ▁This ▁lack ▁of ▁so vere ig nt y ▁was ▁a ▁difficult ▁enough ▁prospect ▁for ▁the ▁highly ▁compet itive ▁railway ▁politics ▁of ▁the ▁era ; ▁but , ▁as ▁traffic ▁developed , ▁con g estion ▁on ▁the ▁busy ▁line ▁became ▁a ▁serious ▁and ▁ob struct ing ▁issue ▁which ▁fuel led ▁conflict . ▁At ▁that ▁time , ▁goods ▁traffic ▁was ▁heavy ▁and ▁slow , ▁thus ▁both ▁line ▁capacity ▁and ▁service ▁reli ability ▁were ▁becoming ▁heavily ▁comprom ised ▁by ▁the ▁high ▁levels ▁of ▁traffic ▁using ▁the ▁existing ▁line . ▁ ▁During ▁the ▁ 1 8 8 1 ▁Parliament ary ▁session , ▁a ▁Bill ▁was ▁lod ged ▁by ▁the ▁G & S WR ▁for ▁the ▁dra ining ▁of ▁the ▁canal ▁and ▁conversion ▁work ▁to ▁build ▁a ▁railway ▁on