▁clim bing ▁the ▁upper ▁arch es ▁of ▁the ▁bridge . ▁The ▁Disc overy ▁Cl imb ▁allows ▁clim bers ▁to ▁asc end ▁the ▁lower ▁ch ord ▁of ▁the ▁bridge ▁and ▁view ▁its ▁internal ▁structure . ▁From ▁the ▁a pe x ▁of ▁the ▁lower ▁ch ord , ▁clim bers ▁asc end ▁a ▁st air case ▁to ▁a ▁platform ▁at ▁the ▁sum mit . ▁ ▁C ele br ations ▁Since ▁the ▁opening , ▁the ▁bridge ▁has ▁been ▁the ▁foc al ▁point ▁of ▁much ▁tour ism ▁and ▁national ▁pride . ▁▁ 5 0 th ▁An ni versary ▁celebr ations ▁( 1 9 8 2 ) ▁In ▁ 1 9 8 2 , ▁the ▁ 5 0 th ▁anni versary ▁of ▁the ▁opening ▁of ▁the ▁bridge ▁was ▁celebrated . ▁For ▁the ▁first ▁time ▁since ▁its ▁opening ▁in ▁ 1 9 3 2 , ▁the ▁bridge ▁was ▁closed ▁to ▁most ▁vehicles ▁with ▁the ▁exception ▁of ▁v int age ▁vehicles , ▁and ▁ped est ri ans ▁were ▁allowed ▁full ▁access ▁for ▁the ▁day . ▁The ▁celebr ations ▁were ▁attended ▁by ▁Edward ▁Judge , ▁who ▁represented ▁D orm an ▁Long . ▁ ▁B ic ent enn ial ▁Australia ▁Day ▁celebr ations ▁( 1 9 8 8 ) ▁Australia ' s ▁b ic ent enn ial ▁celebr ations ▁on ▁ 2 6 ▁January ▁ 1 9 8 8 ▁attract ed ▁large ▁crow ds ▁in ▁the ▁bridge ' s ▁vic inity ▁as ▁mer ry m akers ▁f locked ▁to ▁the ▁for es hor es ▁to ▁view ▁the ▁events ▁on ▁the ▁har bour .