Who is responsible for tree boxes in dc?

Residents of Washington DC often refer to the small plot of land surrounding their street trees as “tree boxes”, but in the city's official regulations on these street trees, the term used is “spaces for trees”. DC has an interesting model for caring for trees on its streets. Unlike many other cities, where the care of street trees is a function of the Department of Parks and Recreation, Washington street and park trees are managed by the Department of Transportation, or DDOT (Dee-Dot), as locals call them. The new requirements ensure that all new fences installed around the perimeter allow the unrestricted flow of rainwater that drains from the sidewalk into the wooded space and that the “height” of the tree fence is approximately eighteen inches (18 inches).