Estimated contribution to visual quality of one additional street tree per mile.
| Average tree size class | Yard tree density (trees per mile) | Increase in visual quality |
|---|---|---|
| 1.5 | 100 | .15036 |
| 1.5 | 200 | .09372 |
| 1.5 | 300 | .03708 |
| 3.5 | 100 | .35084 |
| 3.5 | 200 | .21868 |
| 3.5 | 300 | .08820 |