Traffic Signs Manual – Chapter 4 – Warning Signs

  • Published: Department for Transport, Department for Regional Development (Northern Ireland), Scottish Executive and Welsh Assembly Government, 2004
  • Authors: Department for Transport, Department for Regional Development (Northern Ireland), Scottish Executive and Welsh Assembly Government
  • Date Added: 07 Feb 2013
  • Last Update: 12 Feb 2016
  • Format: pdf

Objectives:

This manual sets out the codes to be followed in the use, siting, and illumination of warning signs both on all-purpose roads and motorways. It also covers temporary signs for use in connection with road works.

Methodology:

Collation of UK legislation, policy and guidance on the use of warning signs on all-purpose roads and motorways.

Key Findings:

  • Warning signs are used to alert drivers to potential danger ahead. They indicate a need for special caution by road users and may require a reduction in speed or some other manoeuvre.

  • Appropriate warning signs can greatly assist road safety. To be most effective, however, they should be used sparingly. Their frequent use to warn of conditions which are readily apparent tends to bring them into disrepute and detracts from their effectiveness. Unjustified signing should not be used at individual locations simply in response to complaints from the public. Care should be taken to ensure a route is treated consistently, especially where it crosses the boundary between two traffic authorities.

  • Warning signs warn drivers of hazards. This includes junctions, two-way traffic, traffic signals, pedestrians, water on the road and bridges and other structures.

Themes:

Signs and markings, policy, legislation

Comments:

Robust government document