▁Drive ). ▁ ▁The ▁original ▁MD ▁ 6 6 5 ▁was ▁transferred ▁from ▁state ▁maintenance ▁to ▁the ▁city ▁of ▁Ann apolis ▁between ▁ 1 9 8 7 ▁and ▁ 1 9 8 9 . ▁By ▁ 1 9 8 9 , ▁modern ▁MD ▁ 6 6 5 , ▁which ▁was ▁intended ▁to ▁mit ig ate ▁con g estion ▁on ▁the ▁western ▁part ▁of ▁Forest ▁Drive , ▁was ▁under ▁construction ▁from ▁US ▁ 5 0 ▁and ▁US ▁ 3 0 1 ▁sout heast ▁to ▁MD ▁ 2 . ▁MD ▁ 6 6 5 ▁opened ▁from ▁US ▁ 5 0 ▁and ▁US ▁ 3 0 1 ▁to ▁MD ▁ 2 ▁in ▁ 1 9 9 1 . ▁The ▁highway ▁opened ▁east ▁to ▁Forest ▁Drive ▁in ▁April ▁ 1 9 9 2 . ▁In ▁October ▁ 1 9 9 2 , ▁state ▁officials ▁named ▁MD ▁ 6 6 5 ▁for ▁Ar is ▁T . ▁Allen , ▁a ▁doctor ▁and ▁former ▁member ▁of ▁the ▁Maryland ▁General ▁Assembly ▁who ▁had ▁died ▁in ▁ 1 9 9 1 . ▁When ▁MD ▁ 6 6 5 ▁was ▁being ▁planned ▁in ▁the ▁early ▁ 1 9 8 0 s , ▁Allen ▁was ▁instrument al ▁in ▁r er out ing ▁the ▁highway ▁to ▁by pass ▁an ▁African - American ▁neighborhood ▁instead ▁of ▁s lic ing ▁through ▁and ▁disp la cing ▁its ▁residents . ▁ ▁J unction ▁list ▁ ▁A ux ili ary ▁routes ▁There ▁are ▁five ▁existing ▁auxili ary ▁routes ▁of ▁MD ▁ 6 6 5 ▁and ▁one ▁former ▁auxili ary ▁route