Maryland roadside tree estimated inventory level by road type for six jurisdictions in the Baltimore-Washington Corridor.
| Road type | Km (%) in study area | Number of plots | Estimated number of trees* |
|---|---|---|---|
| County | 14,221 (66.4) | 406 | 260,917 |
| Municipalities | 4,493 (21) | 21 | 82,428 |
| State Highway Administration | 2,699 (12.6) | 90 | 49,504 |
| Total | 21,413 (100) | 517 | 392,888 |
↵* Calculated stocking rate equals 13.9% based on observed trees and was applied to distance of road.