rol ley ▁system . ▁Arch itect ur ally ▁it ▁complement ed ▁the ▁nearby ▁Union ▁Station , ▁and ▁the ▁two ▁served ▁as ▁the ▁gateway ▁to ▁the ▁city ▁for ▁visitors . ▁Although ▁it ▁eventually ▁switched ▁to ▁operating ▁bus es , ▁United ▁Tra ction ▁remained ▁in ▁the ▁building ▁until ▁the ▁ 1 9 5 0 s , ▁when ▁it ▁became ▁part ▁of ▁the ▁Capital ▁District ▁Transport ation ▁Author ity . ▁It ▁is ▁currently ▁used ▁for ▁other ▁business ▁purposes . ▁ ▁Building ▁ ▁The ▁building ▁s its ▁on ▁a ▁corner ▁lot ▁of ▁just ▁over ▁an ▁a cre ▁( 4 , 5 0 0 ▁m ² ) ▁at ▁the ▁north west ▁corner ▁of ▁Broadway ▁and ▁Columbia ▁Street , ▁one ▁block ▁south ▁of ▁where ▁U . S . ▁Route ▁ 9 ▁ex its ▁from ▁Inter state ▁ 7 8 7 ▁a ▁block ▁to ▁the ▁east ▁along ▁the ▁Hudson ▁River . ▁The ▁surrounding ▁neighborhood ▁is ▁a ▁dens ely ▁developed ▁urban ▁center . ▁To ▁the ▁north ▁of ▁the ▁building ▁is ▁a ▁par king ▁lot ; ▁across ▁Broadway ▁is ▁a ▁tall ▁office ▁building ▁used ▁as ▁the ▁headquarters ▁of ▁the ▁New ▁York ▁State ▁Department ▁of ▁Environment al ▁Conserv ation . ▁To ▁the ▁west ▁are ▁some ▁slightly ▁t aller ▁commercial ▁buildings . ▁Ac ross ▁Columbia ▁Street ▁is ▁the ▁small ▁Tr ic ent enn ial ▁Park . ▁The ▁former ▁Alb any ▁Union ▁Station ▁is ▁on ▁the ▁sout heast . ▁The ▁terrain ▁is ▁level , ▁s lop ing ▁up ▁on ▁the ▁west ▁side ▁slightly . ▁ ▁Although ▁the ▁building ▁is ▁tra pe zo idal , ▁it