Traffic analysis zones are geographic regions. In UrbanSim, these zones are rasterized by the grid cells (the zones are distorted to fit to cell boundaries and thus will have rough or stair-stepped edges).
In practice, the zones table often includes other columns, depending upon the needs for your models. These data should be updated with the results of any travel model run with whatever attributes are needed.
| Column Name | Data Type | Description |
|---|---|---|
| zone_id | integer | Unique identifier |
| travel_time_to_airport | integer | Units: Minutes |
| travel_time_to_cbd | integer | Units: Minutes |
| faz_id | integer | (optional) Foreign key of the FAZ (forecast analysis zone) containing this zone. |