0 0 ▁vehicles ▁daily ) ▁back s - up ▁daily ▁into ▁Ox on ▁Hill ▁until ▁the ▁wider ▁replacement ▁bridge ▁is ▁fully ▁completed ▁in ▁ 2 0 0 8 , ▁bringing ▁relief . ▁( Th ous ands ▁of ▁white - col lar ▁commut ers ▁working ▁in ▁Northern ▁Virginia ' s ▁bo oming ▁economy ▁find ▁that ▁housing ▁is ▁che aper ▁in ▁Prince ▁George ' s ▁County .) ▁ ▁Ox on ▁Hill ▁includes ▁many ▁garden ▁a partment ▁communities ▁along ▁with ▁single - family ▁det ached ▁homes ▁d ating ▁mostly ▁from ▁the ▁ 1 9 4 0 s ▁through ▁the ▁ 1 9 8 0 s , ▁including ▁the ▁incorpor ated ▁town ▁Forest ▁He ights . ▁In ▁earlier ▁dec ades , ▁many ▁residents ▁were ▁scient ists ▁from ▁the ▁adjacent ▁U . S . ▁Naval ▁Research ▁Labor atory , ▁but ▁very ▁few ▁are ▁now . ▁Ox on ▁Hill ' s ▁two ▁principal ▁sho pping ▁cent ers ▁(" R i vert ow ne " ▁and ▁the ▁much ▁older ▁" E asto ver ") ▁attract ▁neighborhood ▁customers ▁as ▁well ▁as ▁sh opp ers ▁from ▁nearby ▁S out heast ▁Washington . ▁E asto ver , ▁located ▁at ▁the ▁D . C . ▁state ▁line , ▁is ▁a ▁hub ▁of ▁many ▁bus ▁routes , ▁some ▁of ▁them ▁operating ▁ 2 4 ▁hours ▁a ▁day , ▁and ▁has ▁a ▁Prince ▁George ' s ▁County ▁Police ▁station . ▁ ▁Geography ▁Ox on ▁Hill - G lass man or ▁is ▁located ▁at ▁ ▁( 3 8 . 8 0 2 5 1 3 , ▁−