▁the ▁Olympic ▁Highway ▁and ▁provides ▁access ▁to ▁the ▁L ach lan ▁Valley ▁Way . ▁At ▁Cow ra ▁the ▁highway ▁heads ▁west , ▁carrying ▁the ▁State ▁Route ▁B 6 4 ▁shield ▁to ▁ ▁with ▁a ▁link ▁to ▁the ▁Henry ▁Law son ▁Way ▁as ▁the ▁Mid - West ern ▁Highway ▁heads ▁further ▁west ▁to ▁its ▁j unction ▁with ▁the ▁New ell ▁Highway ▁at ▁Mars den . ▁From ▁M ards en ▁to ▁West ▁W yal ong ▁the ▁route ▁is ▁concurrent ly ▁bad ged ▁as ▁B 6 4 ▁and ▁as ▁the ▁National ▁Highway ▁A 3 9 . ▁The ▁Mid - West ern ▁Highway ▁and ▁New ell ▁conc urrency ▁termin ates ▁west ▁of ▁West ▁W yal ong ▁and ▁the ▁Mid - West ern ▁continues ▁further ▁west ▁through ▁We eth alle , ▁and ▁then ▁south west ▁to ▁Rank ins ▁Spr ings ▁and ▁G ool g owi ▁before ▁reaching ▁its ▁western ▁termin us ▁in ▁Hay ▁where ▁it ▁joins ▁the ▁St urt ▁Highway ▁via ▁the ▁C obb ▁Highway . ▁ ▁Following ▁the ▁upgrade ▁of ▁the ▁H ume ▁Highway ▁to ▁a ▁dual ▁carriage way ▁along ▁the ▁vast ▁majority ▁of ▁its ▁length ▁in ▁New ▁South ▁Wales ▁and ▁the ▁declaration ▁of ▁the ▁St urt ▁Highway ▁as ▁a ▁national ▁highway , ▁despite ▁the ▁Mid - West ern ▁Highway ▁being ▁the ▁most ▁direct ▁route ▁between ▁Sydney ▁and ▁Ad ela ide , ▁the ▁route ▁via ▁the ▁H ume ▁and ▁St urt ▁high ways ▁through ▁W ag ga ▁W ag ga ▁offers ▁motor ists ▁a ▁quick er ▁route , ▁despite ▁being ▁approximately ▁ ▁longer . ▁ ▁The ▁only