 There is disagreement between the design and user community as to whether installing the aid inside buildings may cause a tripping hazard.A system of tactile paving was first instituted in Japan at pedestrian crossings and other hazardous road situations; the United Kingdom, Australia and the United States picked up the standard in the early 1990s.Canada started incorporating them into transportation first in the 1990s, and then added them to other aspects of the built environment in the early 2000s.