Marker signs – complete overview

Marker signs highlight obstacles, narrowings, ramps, tunnel sections and road edges where drivers need extra visual guidance. Consistent use improves visibility, reduces incidents and clarifies temporary layouts.

For a complete introduction to Norwegian sign groups, see Traffic signs and road markings.

Why marker signs matter

• Warn about hidden hazards before the obstacle is reached
• Guide lane choice through merges, tapers and diversions
• Support night driving with reflective surfaces when lane markings fade
• Work with traffic lights and arrows to keep traffic flowing safely

Regulations and references

• The national sign regulations define when marker signs are mandatory
• Road design manuals describe mounting height, angle and spacing
• Contractors must follow Temporary traffic management when setting out work zones
• Tunnel layouts should align with Driving in tunnels to point at emergency equipment

Quick reference table

Hazard markers (906–908)

Hazard markers guide traffic past fixed obstacles such as refuge islands, guardrails or bollards. Choose the arrow direction that matches the allowed path and pair the sign with clear lane markings. Where width is tight, coordinate with height and width rules in Dimension limits.

Tunnel and exit markers (912–916)

Signs 912, 914 and 916 provide direction and distance in tunnels. Install them on both sides so the driver always sees the next marker, and ensure lighting does not wash out the reflective surface. Synchronise the layout with tunnel ventilation and emergency cabinets.

Delineator posts and barrier markings (920–930)

Delineator posts in the 920 series keep drivers on the right line in darkness, snow and fog. Inspect reflective areas regularly and clear snow banks. Barrier marking 930 closes lanes during incidents or maintenance—coordinate with Traffic control and flow to manage queues and lane changes.

Temporary equipment (940–942)

Traffic cones (940) and cylinders (942) indicate short-term lane closures or shifts. Add lighting for night work and ensure each unit is weighted so it stays upright in heavy traffic. See Work zone traffic management for placement principles.

Checklist before installing marker signs

1. Assess speed, sight distance and traffic volume.
2. Select the correct code and arrow direction for the manoeuvre.
3. Check that the marker does not hide other critical signs.
4. Secure the base and mount height (normally 1.0–1.5 m above roadside level).
5. Verify visibility in daylight and darkness before opening the section.
6. Record the layout and schedule inspections.

Common mistakes and inspections

• Wrong angle reduces guidance—adjust towards the traffic flow.
• Worn reflectors weaken night visibility—replace aged sheeting.
• Missing tunnel sequence breaks the rhythm and confuses drivers.
• Unweighted cones move in crosswinds or due to buses passing close.
• Uncoordinated signage creates noise—use the Sign overview to double-check plans.

Complete code list

Related reading

• Traffic light systems
• Communication with other road users
• Visibility requirements: snow and ice
• Temporary traffic management