| Code Value | Definition |
|---|---|
| 0 | No Controls |
| 1 | Traffic control signal |
| 20 | Stop Sign |
| 21 | Yield Sign |
| 23 | School Zone Sign/Device |
| 4 | Flashing Traffic Control Signal |
| 40 | Warning Sign |
| 50 | Person (including flagger, law enforcement, crossing guard, etc.) |
| 65 | Railway Crossing Device |
| 97 | Not Reported |
| 98 | Other |
| 99 | Unknown |