▁west ▁car ries ▁the ▁State ▁Route ▁B 6 4 ▁shield ▁to ▁; ▁and ▁the ▁L ach lan ▁Valley ▁Way ▁that ▁generally ▁runs ▁north west - s outh west ▁between ▁ ▁and ▁ ▁and ▁beyond . ▁The ▁Olympic ▁Highway ▁heads ▁generally ▁south ▁by ▁west ▁through ▁Ko or aw ath a , ▁, ▁, ▁, ▁W ag ga ▁W ag ga , ▁and ▁ ▁towards ▁its ▁southern ▁termin us ▁via ▁a ▁tr ump et ▁inter change ▁with ▁the ▁H ume ▁Highway ▁located ▁ ▁north ▁of ▁Al bury ▁at ▁. ▁ ▁The ▁only ▁major ▁river ▁crossing ▁is ▁the ▁M urr umb idge e ▁River , ▁crossed ▁between ▁ ▁and ▁W ag ga ▁via ▁the ▁G obb ag omb alin ▁Bridge , ▁at ▁ ▁long ▁believed ▁to ▁be ▁the ▁longest ▁continuous - span ▁vi ad uct ▁in ▁New ▁South ▁Wales , ▁situated ▁about ▁ ▁north west ▁of ▁the ▁W ag ga ▁C BD ▁and ▁opened ▁on ▁ 2 6 ▁July ▁ 1 9 9 7 . ▁Prior ▁to ▁the ▁completion ▁of ▁the ▁" G ob ba " ▁Bridge , ▁the ▁Olympic ▁Highway ▁followed ▁a ▁route ▁that ▁took ▁it ▁through ▁the ▁W ag ga ▁central ▁business ▁district ▁via ▁the ▁H amp den ▁Bridge , ▁a ▁wooden ▁All an ▁Tr uss ▁bridge ▁that ▁was ▁opened ▁in ▁ 1 8 9 5 ▁and ▁eventually ▁demol ished ▁in ▁ 2 0 1 4 . ▁ ▁Major ▁inter sections ▁ ▁Gallery ▁ ▁See ▁also ▁▁ ▁High ways ▁in ▁Australia ▁ ▁High ways ▁in ▁New ▁South ▁Wales ▁ ▁References ▁ ▁External ▁links ▁▁▁