9 3 , ▁and ▁soon ▁became ▁the ▁core ▁of ▁the ▁Metropolitan ▁Street ▁Railway , ▁with ▁two ▁cable ▁branches : ▁the ▁Broadway ▁and ▁Lex ington ▁Avenue ▁Line ▁and ▁Broadway ▁and ▁Columb us ▁Avenue ▁Line . ▁ ▁These ▁street car ▁lines ▁were ▁replaced ▁with ▁bus ▁routes ▁in ▁the ▁ 1 9 3 0 s ▁and ▁ 1 9 4 0 s . ▁Before ▁Broadway ▁became ▁one - way , ▁the ▁main ▁bus ▁routes ▁along ▁it ▁were ▁the ▁New ▁York ▁City ▁Om n ibus ▁Company ' s ▁( N Y CO ) ▁ 6 ▁( B road way ▁below ▁Times ▁Square ), ▁ 7 ▁( B road way ▁and ▁Columb us ▁Avenue ), ▁and ▁ 1 1 ▁( N inth ▁and ▁Amsterdam ▁Aven ues ), ▁and ▁the ▁Sur face ▁Transport ation ▁Corporation ' s ▁M 1 0 0 ▁( K ings bridge ) ▁and ▁M 1 0 4 ▁( B road way ▁Branch ). ▁Additionally , ▁the ▁Fif th ▁Avenue ▁Co ach ▁Company ' s ▁( F AC Co ) ▁ 4 ▁and ▁ 5 ▁used ▁Broadway ▁from ▁ 1 3 5 th ▁Street ▁north ▁to ▁Washington ▁He ights , ▁and ▁their ▁ 5 ▁and ▁ 6 ▁used ▁Broadway ▁between ▁ 5 7 th ▁Street ▁and ▁ 7 2 nd ▁Street . ▁With ▁the ▁implementation ▁of ▁one - way ▁traffic , ▁the ▁north bound ▁ 6 ▁and ▁ 7 ▁were ▁moved ▁to ▁Six th ▁Avenue . ▁ ▁, ▁Broadway ▁is ▁served ▁by ▁the ▁M 4 ▁( ex - F AC Co ▁ 4 ), ▁M 7