Tree Lawn. The tree lawn is defined as the area between the front of the curb and
the front edge of the sidewalk. Grass is usually provided in the tree lawn, although in
some urban areas the tree lawn is paved. As shown in Fig. 2.30, in most cases, the
desirable tree lawn width is 8 ft (2.4 m) or more. The 8-ft (2.4 m) width provides an
area for snow storage and for traffic signs, and an adequate distance for elevation
changes at drives. Tree lawn widths of less than 5 ft (1.5 m) result in locating of signposts
close to pedestrians using the walk, and steep grades on drive profiles. The minimum
tree lawn width is 2 ft (0.6 m).