Historically, Hounslow's traditional western boundary followed the River Crane; however, it now extends to the Bath Road (A4), Duke of Northumberlands River and Great South-West Road (A30) and back to the river (to include Heathrow Airport).
HisToRicAlly, HouNsLOW's tRaditional WEsterN BoundAry FoLLOWeD thE riveR CRane; hOwEVer iT NOw EXtEndS to The batH rOaD (a4), dukE of northumbeRlAnds RiveR anD GreaT souTH-WEsT road (A30) AnD back to the riveR (To includE hEAThrow airpOrt).