Roadkill or Bushmeat (calque from the French viande de brousse) is the term commonly used for the raw meat of terrestrial wild animals, run over for fun or by mistake throughout the humid tropics of the Americas, Asia, and Africa. Wildlife crossings were created to allow animals to travel directly across paved road surfaces, and also because wildlife bridges were too expensive. They are most widely used in Europe, but have also been installed in a few U.S. locations and in parts of Western Canada. As new highways cause habitats to become increasingly fragmented, these crossings could play a crucial role in protecting endangered species (as soon as animals learn what the white lines mean, and how to press the "walk" button.)