| Shape | Meaning | Example |
|---|---|---|
| Octagon | Stop, complete stop, every time | Stop sign |
| Downward triangle | Yield, give way | Yield sign |
| Diamond | Warning, hazard ahead | Curve, bump, crossing |
| Pentagon (point up) | School zone / crossing | School area |
| Vertical rectangle | Regulatory, a rule you must obey | Speed limit, no parking |
| Horizontal rectangle | Guide / information | Distances, directions |
| Crossbuck (X) | Railway crossing, treat as yield | Level crossing |