▁ 2 0 1 2 ▁Olympic ▁Tor ch ▁relay ▁crossed ▁over ▁the ▁bridge , ▁where ▁two ▁of ▁the ▁tor ch b ear ers ▁came ▁together ▁in ▁a ▁" k iss " ▁to ▁exchange ▁the ▁fl ame ▁in ▁the ▁middle ▁of ▁Brun el ' s ▁icon ic ▁land mark . ▁The ▁bridge ▁car ries ▁four ▁million ▁vehicles ▁per ▁year , ▁along ▁part ▁of ▁the ▁B 3 1 2 9 ▁road . ▁The ▁bridge ▁is ▁a ▁grade ▁I ▁listed ▁building . ▁ ▁In ▁November ▁ 2 0 1 1 ▁it ▁was ▁announced ▁that ▁a ▁new ▁visitor ▁centre , ▁cost ing ▁nearly ▁£ 2 ▁million , ▁was ▁to ▁be ▁built ▁at ▁the ▁Le igh ▁Wood s ▁end ▁of ▁the ▁bridge ▁to ▁replace ▁the ▁temporary ▁building ▁currently ▁being ▁used . ▁The ▁new ▁facilities ▁were ▁scheduled ▁to ▁be ▁completed ▁before ▁the ▁ 1 5 0 th ▁anni versary ▁of ▁the ▁opening , ▁which ▁was ▁celebrated ▁on ▁ 8 ▁December ▁ 2 0 1 4 . ▁In ▁December ▁ 2 0 1 2 ▁it ▁was ▁announced ▁that ▁the ▁bridge ▁had ▁received ▁£ 5 9 5 , 0 0 0 ▁of ▁fund ing ▁from ▁the ▁Heritage ▁Lot tery ▁Fund ▁to ▁improve ▁the ▁visitor ▁centre . ▁ ▁Archives ▁The ▁University ▁of ▁Br istol ▁Special ▁Col lections ▁holds ▁substantial ▁records ▁related ▁to ▁the ▁bridge . ▁Let ter ▁books ▁of ▁the ▁trust ees ▁of ▁Cl if ton ▁Sus p ension ▁Bridge ▁dated ▁ 1 8 3 1 – 1 8 6 2 ▁are ▁held ▁at ▁Br istol ▁Archives ▁( Ref . ▁ 1