Warning Signs for Road Works
Road works are a common feature on Irish roads, and special warning signs are used to alert drivers to temporary hazards and changes in driving conditions. These signs are vital for keeping both road users and workers safe.
What They Do
They warn you of temporary conditions such as lane closures, diversions, or uneven road surfaces caused by road works. Drivers must pay close attention and be prepared to adjust speed and driving behaviour.
Shapes & Colours
🔶 Diamond-shaped: Same as standard warning signs.
🟧 Orange background with black symbols: Distinguishes them from permanent yellow warning signs.
Warning Signs for Road Works
Roadworks Ahead
One-Lane Crossover (Out)
One-Lane Crossover (Back)
Move to Left (One Lane)
Move to Right (One Lane)
Move to Left (Two Lanes)
Move to Right (Two Lanes)
Obstruction Between Lanes
End of Obstruction Between Lanes
Start of Central Reserve or Obstruction
End of Central Reserve or Obstruction
Lanes Diverge at Crossover
Lanes Rejoin at Crossover
Two-Lanes Crossover (Back)
Two-Lanes Crossover (Out)
Single Lane (For Shuttle Working)
Two-Way Traffic
Road Narrows From Left
Road Narrows From Right
Road Narrows on Both Sides
Nearside Lane (of Two) Closed
Offside Lane (of Two) Closed
Offside Lane (of Three) Closed
Nearside Lane (of Three) Closed
Two Offside Lanes (of Three) Closed
Two Nearside Lanes (of Three) Closed. Two Alternative Styles.
Offside Lane (of Four) Closed
Nearside Lane (of Four) Closed
Two Offside Lanes (of Four) Closed
Two Nearside Lanes (of Four) Closed
Side Road on Left
Side Road on Right
Site Access on Left
Site Access on Right
Temporary Traffic Signals Ahead
Flagman Ahead
Queues Likely
Hump or Ramp
Uneven Surface
Slippery Road
Loose Chippings
Pedestrians Cross to Left
Pedestrians Cross to Right
Overhead Electric Cables
Detour Ahead
Detour to Left
Detour to Right
Road Closed
Diverted Traffic Left
Diverted Traffic Right
Diverted Traffic
Diverted Traffic
End of Detour
Detour Destination
Information Plates at Roadworks
Distance
Length
Direction
Direction and Distance
End
Cautionary
Slow
Concealed Entrance
Type of Works
Use Hard Shoulder
Hard Shoulder Closed
Unfinished Road Surface
Barrier Boards
Chevron Board
Speed Limit Ahead
Manual Traffic Control Sign at Roadworks
Flagman Ahead
Stop
Either Form of Go or Téigh can be used
Why They Matter for the Driving Test
- Examiners expect you to respond correctly to temporary warning signs.
- Failing to slow down or ignoring road works instructions can result in a serious fault.
- Safe driving near road works shows awareness, adaptability, and hazard anticipation.
Quick Tips
- Always reduce your speed when approaching orange warning signs.
- Be prepared for sudden stops, narrow lanes, or workers on the road.
- Follow temporary traffic signals and diversions without hesitation.
