Road Narrows Near Side Sign Face Post Mounted 517 (Face Only)

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Road Narrows Left Sign 517

The road narrows on the left sign to diagram 517L gives an advance warning of the road narrowing on the left (current) side. This means the thinning of the route creates a potential hazard because you will have to drive closer to oncoming traffic. If the narrowing doesn't remove a lane from the junction and the lane does not have a severe taper, the sign isn't needed. Table 4-1 on page 19 of the Traffic Signs Manual, Chapter 4 covers the specific taper criteria. The alternative version of this diagram is reversed, the "Road Narrows Right" sign would be used where the right (opposite) side of the road is forced closer to the centre line.

You will find this sign before thinning of the near side of the junction at a turning. It is necessary wherever a lane is lost on a single carriageway road or where the centre line has faded or omitted from wear. Vehicles with wide clearance may struggle the most in these areas, especially a turning. Therefore, supplementary plates can be used to further inform drivers of the potential hazards:

  • Diagram 511- "Reduce Speed Now"
  • Diagram 518- "Single File Traffic"
  • Diagram 519- "Single Track Road"
  • Diagram 572- "Distance Ahead"
  • Diagram 575- "Oncoming Vehicles in Middle of Road"

The standard size for this sign is 600mm, but the size can go up to 1500mm. Other sizing can be arranged if needed through calling our sales team.

Superior Quality Sign Face

Superior quality speed bump sign

Superior quality prismatic reflective sign face ensure that the sign stands the test of time.

Durable Composite Base

Classic roll up sign hinge

Made from a composite material which is an aluminium covering over plastic, it is light and ultra strong.

Designed to be Post Mounted

Protected reflective face

Each Part of the sign comes with two rails allowing the fitment of two clips per face for secure mounting.


Conforms Class 2 Reflectivity
Diagram Reference 517L
AccuChecked ✔ (The specification has been independently checked for accuracy)
AccuPhoto ✔ (The photos are of the actual product type that you are ordering)
Thickness 3.6mm (face), 20mm (including rails)
Type R2/RA2 reflective material on composite backing
Colour Grey backing, white, red and black signage
Customisation Alternative wording and sizes available. Please call for details.

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