Areas for vehicular and pedestrian traffic should be graded between 2 - 4% to reduce the chances of depressions forming. ([https://www.ontario.ca/laws/regulation/110191 maximum permitted 5% for AODA]) | Areas for vehicular and pedestrian traffic should be graded between 2 - 4% to reduce the chances of depressions forming. ([https://www.ontario.ca/laws/regulation/110191 maximum permitted 5% for AODA]) |