Chapter 8 Traffic Management: A Plain English Guide for Contractors

If you're working on or near a road in the UK — even just digging up a pavement — you're required to implement temporary traffic management (TTM) in accordance with Chapter 8 of the Traffic Signs Manual. Getting it wrong is not just a safety issue; it can result in prosecution under the Highways Act 1980.

What Is Chapter 8?

Chapter 8 is a chapter of the UK Traffic Signs Manual, published by the Department for Transport. It covers the design, installation and operation of temporary traffic management on public roads, including motorways, A-roads, B-roads, local roads and footways.

Chapter 8 was substantially revised in 2009, with updates incorporated into the Safety at Street Works and Road Works — A Code of Practice (the "Red Book") and the Traffic Signs Regulations and General Directions (TSRGD) 2016.

Who Needs to Comply with Chapter 8?

Chapter 8 applies to anyone carrying out works on or near a highway, including:

• Utility companies (gas, electricity, telecoms, water)
• Highway authorities (councils)
• Construction contractors
• Event organisers requesting road closures
• Any business working on a public footway

Chapter 8 Signing Equipment

Standard Chapter 8 equipment includes:

Signs

• 750mm or 600mm yellow-backed temporary signs
• Traffic management ahead signs
• Speed restriction signs (20, 30, 40 mph)
• Diversion route signs

Cones

• 300mm cones — footways and low-speed areas only
• 500mm cones — roads up to 40 mph
• 750mm cones — mandatory on roads 50 mph and above

Barriers and Guards

• Pedestrian guard rail to protect excavations
• Pedestrian diversion barriers
• Water-filled barriers for vehicle lane management on high-speed roads

Lights

• Amber flashing lights on all signs and equipment at night
• Portable traffic signals (stop/go lights) where required

Chapter 8 Operatives — LANTRA/NHSS Training

All operatives responsible for installing and maintaining Chapter 8 TTM must hold a valid NHSS (National Highway Sector Scheme) 12 qualification:

• NHSS 12AB — Basic TTM (low-speed local roads)
• NHSS 12D — Operative certificate
• NHSS 12F — Single carriageway roads up to dual carriageway
• NHSS 12G — Motorway and high-speed roads

Certificates must be renewed every 5 years.

Common Chapter 8 Mistakes

• Using 500mm cones on a 50 mph road (should be 750mm)
• No advance warning signs outside the works zone
• Signs not perpendicular to traffic flow
• Cones/signs not ballasted in windy conditions
• Pedestrian alternative route not provided or inadequate
• Works running over time without updating the TTM plan

FAQ

Do I need a Chapter 8 qualification to use traffic cones?

If you're placing cones on a public highway as part of any work activity, yes — the person responsible for the TTM must hold a current NHSS 12 qualification. Simply using a cone to mark a pothole for seconds is a grey area, but formal works require qualified operatives.

What happens if my Chapter 8 TTM is not compliant?

The local highway authority can issue a fixed penalty notice, require immediate rectification, or prosecute under the Highways Act 1980 or New Roads and Street Works Act 1991. Liability for accidents caused by non-compliant TTM falls on the contractor.

How long can a Chapter 8 TTM layout stay in place?

There's no absolute time limit, but works should be completed within the duration specified in the Section 50 licence (for utility works) or highway authority permit. Layouts left in place longer than specified can be removed by the highway authority at the contractor's cost.

Related guides: water filled barriers | high visibility products for road safety | road plates and trench covers | pedestrian crossing equipment | highway code and traffic calming | event barriers and crowd management