 Arguments have been made that the money spent on installing tactile pavement could have been much better spent making other improvements that vision-impaired people have actually requested, such as faster repairs to broken pavement, and that more thought should have been put into balancing the needs of vision-impaired pedestrians and mobility-impaired pedestrians, such as wheelchair and cane users who can trip on the bumps.In Canada, detectable warning surfaces have in recent years started to be found in many provincial and municipal building standards (supplements to the building codes).These standards require detectable warning surfaces in prescribed locations, such as on the slopes of pedestrian curb cuts/curb ramps, exterior and interior ramps, at the top of stairs and on landings, and at the edge of rail platforms.