• Offences relating to fire exits (Exit & Evacuation)

  • Offences relating to fire exits (Fire)

  • Office (Door Sign)

  • One Hour Parking (Parking)

  • One way left sign (Regulatory)

  • One way left sign - non-reflective (Regulatory)

  • One way left sign - reflective (Regulatory)

  • One way right sign (Regulatory)

  • One way right sign - non-reflective (Regulatory)

  • One way right sign - reflective (Regulatory)

  • Open Cut (Mining)

  • Open Door With Care (Warning)

  • Open Hole (Mining)

  • Open Pit (Danger)

  • Open Pit (Mining)

  • Open Stope (Mining)

  • Our Safety Depends on Cleanliness

  • OUT (Door Sign)

  • Out of Service (Warning)

  • Overhead Crane (Warning)

  • Overhead Crane (Mining)

  • Overhead Hazard (Mining)

  • Overhead Power Lines (Danger)

  • Oxygen No Smoking no open flames (Danger)

  • Oxygen, No Smoking, No Open Flames (Mining)