Another important consideration is the density of pedestrian traffic in the area. In busy urban settings, a larger grate may be required to provide adequate surface area for tree growth while also ensuring that pedestrians have ample space to walk without tripping. Furthermore, the overall design of the urban landscape can dictate grate size; elements like nearby benches, lighting fixtures, and other street furniture must be taken into account.

What is free and clear?
Free and clear is a term meaning that is free access to the manhole for our field staff to work.This would be enough room for two men to work to remove the lid and gain access with material. Trees, shrubs and other material. Trees, shrubs and other plantings should be placed far enough away to allow access by our field staff and not block access to the manhole. Access maybe necessary during adverse weather conditions where visual location of the manhole may be difficult. Plantings make locating manholes harder. Planning your landscaping with this in mind will help to minimize property damage in the event of an emergency.