▁The ▁L amar ▁Bou lev ard ▁Bridge ▁is ▁a ▁historic ▁arch ▁bridge ▁carrying ▁Texas ▁State ▁Highway ▁Loop ▁ 3 4 3 ▁( L amar ▁Bou lev ard ) ▁over ▁Lady ▁Bird ▁Lake ▁in ▁dow nt own ▁Austin , ▁Texas , ▁United ▁States . ▁The ▁bridge ▁features ▁six ▁open - sp and rel ▁concrete ▁arch es ▁sp anning ▁ ▁and ▁car ries ▁tens ▁of ▁thousands ▁of ▁vehicles ▁daily ▁across ▁the ▁lake . ▁Comple ted ▁in ▁ 1 9 4 2 , ▁the ▁L amar ▁Bou lev ard ▁Bridge ▁was ▁the ▁second ▁permanent ▁bridge ▁to ▁cross ▁the ▁Colorado ▁River ▁( after ▁the ▁Ann ▁W . ▁Rich ards ▁Congress ▁Avenue ▁Bridge ), ▁and ▁one ▁of ▁the ▁last ▁Art ▁Dec o - style ▁open - sp and rel ▁concrete ▁arch ▁brid ges ▁built ▁in ▁Texas . ▁The ▁bridge ▁was ▁named ▁an ▁Austin ▁Land mark ▁in ▁ 1 9 9 3 ▁and ▁added ▁to ▁the ▁National ▁Register ▁of ▁Historic ▁Places ▁in ▁ 1 9 9 4 . ▁ ▁History ▁In ▁the ▁late ▁ 1 9 3 0 s , ▁Austin ▁had ▁greatly ▁out g rown ▁its ▁original ▁town ▁plan ▁on ▁the ▁north ▁bank ▁of ▁the ▁Colorado ▁River . ▁In ▁ 1 9 3 9 , ▁the ▁city ▁planned ▁a ▁new ▁major ▁north - s outh ▁thorough fare ▁to ▁run ▁to ▁the ▁west ▁of ▁the ▁Texas ▁State ▁Capit ol ▁and ▁connect ▁the ▁city ' s ▁western ▁housing ▁develop ments . ▁This ▁new ▁street , ▁eventually ▁named ▁L amar ▁Bou lev ard , ▁would ▁roughly ▁parallel ▁the ▁course ▁of ▁Sho