`maintenance-vehicle-present` | A GPS-enabled maintenance vehicle is located in the road event area, implying that workers are present. `wearables-present` | Workers wearing wearable detection equipment are present in the work zone. `mobile-device-present` | Workers with GPS-enabled mobile dev...
Approximations of the location can include but are not limited to a point relative to a posted mile maker or cross street, selecting a point on a map, or locations based on project plans. `verified` | Verified locations for the work zone road event geometry representing the actual extents ...