Description of treatment groupings in parking lot design analysis. Number of curbs was assigned for analysis of canopy size by design type.
| Treatment group | Number of curbs |
|---|---|
| Parking edge distant | 0 |
| Parking edge close | 1 |
| Vegetation strip | |
| >3 m | 2 |
| 1–3 m | 2 |
| <1 m | 2 |
| Dual tree narrow oval (>3:1 dimension ratio) | 2 |
| Columnar knuckle, L and T | 3 if connected to larger soil zone |
| Columnar knuckle, L and T | 4 if not connected to larger soil zone |
| Triangulated knuckle | 3 if connected to larger soil zone |
| Triangulated knuckle | 4 if not connected to larger soil zone |
| Classic tree pit opening (<3:1 dimension ratio) | 4 |