▁cost ▁of ▁between ▁£ 2 0 ▁and ▁£ 2 8 ▁million . ▁A ▁large ▁proportion ▁of ▁these ▁costs ▁were ▁due ▁to ▁the ▁challenge ▁pos ed ▁by ▁nine ▁of ▁the ▁line ' s ▁twelve ▁over brid ges , ▁which ▁required ▁elect r ification ▁clear ance ▁work ▁under ▁traditional ▁practices ; ▁further ▁difficulties ▁were ▁present ▁at ▁the ▁site ▁of ▁three ▁of ▁these ▁brid ges , ▁as ▁they ▁were ▁adjacent ▁to ▁station ▁platforms , ▁so ▁any ▁track ▁lower ing ▁would ▁necess itate ▁platform ▁re - const ruction ▁as ▁well . ▁As ▁the ▁high ▁costs ▁of ▁a ▁conventional ▁approach ▁was ▁jud ged ▁to ▁be ▁around ▁twice ▁that ▁of ▁which ▁could ▁be ▁just ified ▁by ▁the ▁business ▁case , ▁innov ative ▁measures ▁and ▁comprom ises ▁al ike ▁were ▁adopted ▁for ▁the ▁planned ▁elect r ification ▁work . ▁ ▁According ▁to ▁Sh ir res , ▁a ▁policy ▁of ▁closer ▁working ▁relationships ▁between ▁national ▁infrastr ucture ▁maintain er ▁and ▁owner ▁Network ▁Rail ▁and ▁franch ise ▁operators , ▁in ▁this ▁case ▁Scot R ail , ▁had ▁the ▁benefit ▁of ▁significantly ▁reducing ▁the ▁cost ▁of ▁the ▁line ' s ▁elect r ification . ▁For ▁the ▁six - week ▁construction ▁period , ▁Scot R ail ▁wa ived ▁its ▁compens ation ▁payment ▁rights ▁normally ▁associated ▁with ▁short ▁notice ▁dis rupt ive ▁poss essions ▁and ▁also ▁arranged ▁for ▁its ▁sister ▁company , ▁First ▁Glasgow , ▁to ▁accept ▁Scot R ail ▁train ▁tick ets ▁on ▁local ▁bus ▁services . ▁Ob ser ving ▁that ▁only ▁EM Us ▁were ▁intended ▁to ▁operate ▁the ▁route , ▁Network ▁Rail ▁developed