Roads

• A40 motorway (Canada), a road in Québec
• A40 motorway (France)
• A40 motorway (Germany)
• A40 road (Great Britain), a road connecting London and Fishguard, Wales
• A40 road (Isle of Man), a primary road which connects the A3 with the A1

Other

• Antonov A-40, an aircraft
• Austin A40
  Austin A40
  A number of different automobiles were marketed under the Austin A40 name by the Austin Motor Company between 1947 and 1967.Austin's naming scheme at that time derived from the approximate engine output, in horsepower...
  
   and Innocenti A40, a car from the British Motor Corporation and its Innocenti version
• Beriev A-40
  Beriev A-40
  This article is about the amphibious jet. For Soviet tank airlift project, see Antonov A-40.This article is about the amphibious jet. For Soviet tank airlift project, see Antonov A-40.This article is about the amphibious jet...
  
  , an aircraft