The moment any work activity encroaches on a public road, footway, or any area where vehicles or pedestrians move, a Traffic Management Plan (TMP) becomes a critical document — and in most cases, a legal requirement. Yet many contractors and site managers are unclear about exactly when a TMP is needed, what it should contain, who is qualified to write one, and what physical equipment is required to implement it safely.
This guide demystifies the Traffic Management Plan — covering the UK's legal framework, what a TMP must include, the roles and responsibilities involved, and the physical traffic management products needed to implement one effectively.
What Is a Traffic Management Plan?
A Traffic Management Plan is a formal document that sets out how vehicle and pedestrian movement in and around a work zone will be managed safely during a construction, utility, maintenance, or events operation. It describes:
- The nature and location of the works
- How existing traffic flows will be maintained, diverted, or controlled
- The physical measures (signs, barriers, cones, signals) that will be used to segregate the works from moving traffic
- Arrangements for pedestrians, cyclists, and emergency vehicle access
- The roles and responsibilities of all persons involved in traffic management
- Communication arrangements with the relevant authorities and the public
A TMP is not the same as a risk assessment, though it should be informed by one. It is also distinct from a Method Statement (which describes how work is to be carried out), though the two are often produced together as part of a works package.
The Legal Framework: When Is a TMP Required?
New Roads and Street Works Act 1991 (NRSWA)
The NRSWA provides the primary legal framework for works on or near public highways in England, Wales, and Scotland. Under NRSWA, utilities companies and their contractors must notify the relevant Highway Authority before commencing road or street works, and must comply with the Safety at Street Works and Road Works — A Code of Practice (the "Red Book"), which provides detailed guidance on traffic management requirements.
The NRSWA requires that persons undertaking street works and road works have appropriate training and accreditation under the National Highways Sector Scheme (NHSS) 12, which is the standard for traffic management operatives and supervisors.
Traffic Management Act 2004
The Traffic Management Act (TMA 2004) extended the regulation of works on public roads, introducing the role of the Network Management Duty, which places a legal duty on local traffic authorities to manage their road networks to minimise disruption. Under the TMA, permit schemes can require TMPs to be submitted and approved before works commence.
Construction (Design and Management) Regulations 2015 (CDM)
CDM 2015 requires that construction projects involving any work on or near a public road have adequate arrangements for managing traffic safely. The Construction Phase Plan (which CDM requires for notifiable projects) must address traffic management as part of the broader site safety arrangements.
Highways Act 1980
The Highways Act provides the framework for licensing works on public highways, including the requirement for a Highway Authority licence (Section 50 licence) for works that break the surface of the highway, and a Scaffold/Obstruction licence (Section 171) for works that temporarily obstruct the highway.
What Should a Traffic Management Plan Include?
A comprehensive TMP for road or street works should include the following elements:
1. Project Information
- Works location (with OS grid reference or precise address)
- Nature of works (utility excavation, carriageway resurfacing, etc.)
- Estimated duration and programme
- Name of the promoting organisation and lead contractor
- Contact details for 24/7 emergency response
2. Site Plan
A scaled drawing (or clear sketch plan) showing:
- The extent of the works
- The layout of all traffic management measures (signs, cones, barriers, signals)
- Diverted traffic routes
- Pedestrian diversions and temporary footway arrangements
- Emergency vehicle access routes
3. Traffic Management Measures
A detailed description of the physical traffic management equipment to be used, including:
- Chapter 8 compliant traffic signs — type, size, and placement
- Traffic cones, delineators, and channelling devices
- Temporary traffic signals (if required)
- Vehicle-mounted attenuators and safety vehicles
- Temporary barriers and pedestrian guardrails
- Road markings (temporary or permanent)
4. Risk Assessment
- Identification of hazards associated with the works and the traffic management scheme
- Assessment of the risk to road workers, pedestrians, cyclists, and other road users
- Control measures for identified risks
5. Roles and Responsibilities
- Traffic Management Supervisor (TMS) — qualified NHSS 12 operative responsible for setting out and maintaining the TM scheme
- Traffic Management Operative (TMO) — responsible for day-to-day operation of the scheme
- Stop-go board operators (if manually controlled traffic flow is required)
- Works supervisor — overall responsibility for safe working on site
6. Communication Plan
- Notification arrangements for the Highway Authority, Police, and other stakeholders
- Public information measures (signage, local resident notification, social media)
- Liaison arrangements with emergency services for access
Who Can Write a Traffic Management Plan?
A TMP for any works on or near a public road should be written or at minimum reviewed by a qualified Traffic Management Professional. In the UK, relevant qualifications include:
- NHSS 12 Category C (TM Designer): The benchmark qualification for personnel designing traffic management schemes for road works. Requires practical experience and a formal training course
- Chartered membership of the Chartered Institution of Highways and Transportation (CIHT): Relevant for complex or major scheme design
- IMechE / ICE chartered engineers: For schemes with significant structural or civil engineering elements
For simpler works on minor roads, an experienced NHSS 12 Supervisor with Category B accreditation may be sufficient to design and implement the TM scheme from a prescribed design in the Safety at Street Works Code of Practice.
Products Required to Implement a Traffic Management Scheme
A TMP is only as effective as its implementation. The physical products required for a typical UK road works traffic management scheme include:
Chapter 8 Traffic Signs
All traffic signs used in road works must comply with the Traffic Signs Regulations and General Directions (TSRGD) 2016 and the Chapter 8 guidance within the Traffic Signs Manual. Common signs include:
- Works ahead warning signs
- Temporary speed limit signs
- Road narrows and lane closure signs
- Keep left/right signs
- Temporary road markings
Traffic Cones and Delineators
Standard 750mm high cones for most carriageway works; 1,000mm (metre) cones for motorway and dual-carriageway applications. Chapter 8 specifies minimum spacings and layouts for different speed environments.
Temporary Traffic Barriers
For works adjacent to live traffic at higher speeds, rigid or semi-rigid temporary barriers provide physical protection between the works zone and moving vehicles. Options include water-filled plastic barriers (New Jersey profile) and steel safety barriers. Browse our range of traffic barriers designed for UK road works applications.
Pedestrian Guardrailing
Where pedestrian diversions are required, Chapter 8-compliant pedestrian guardrailing (typically Heras-style or purpose-designed pedestrian barriers) creates a safe protected route for pedestrians around the works zone.
Road Safety Signs
Beyond Chapter 8 traffic management signs, a range of advisory and mandatory signs are typically required. Our road safety signs collection includes vehicle speed signs, pedestrian crossing signs, and hazard warning boards for road and construction applications.
Lighting
For works that operate during hours of darkness or in low-light conditions, Chapter 8 requires lights on cones and barriers at specified intervals. Battery-powered LED amber flashing lights are the standard solution for most UK road works applications.
Common Mistakes in Traffic Management Plans
- Failing to notify the Highway Authority or Police before commencing works
- Producing a generic TMP rather than one specific to the exact site and works
- Failing to include a pedestrian diversion plan where the existing footway is obstructed
- Using non-compliant or damaged traffic signs or cones
- Failing to maintain the TM scheme throughout the duration of works — signs drift, cones get moved, gaps appear
- Not updating the TMP when works change in scope or duration
Frequently Asked Questions
Do I need a Traffic Management Plan for works on a private road?
If the road or area is entirely private and carries no public right of way, a formal statutory TMP is not required by the NRSWA or TMA. However, if the works create a risk to vehicle or pedestrian movement, a traffic management risk assessment and appropriate physical measures are still required under the Health and Safety at Work etc. Act 1974 and CDM 2015.
How far in advance do I need to notify the Highway Authority of roadworks?
Under the NRSWA and permit scheme requirements, the notice period depends on the category of works and the permit scheme in force in your area. As a general guide: major works — 3 months; standard works — 10 business days; minor works — 3 business days; emergency works — as soon as practicable after emergency action is taken (retrospective notification). Always check the specific requirements with your local Highway Authority.
What happens if I don't have a Traffic Management Plan?
Working on a public road without required statutory notices and a compliant TM scheme can result in prohibition orders from the Highway Authority, prosecution under the NRSWA (fines up to £5,000 for utility companies), and unlimited liability under the Health and Safety at Work Act if an incident occurs. Insurance cover may also be invalidated for works not carried out in accordance with statutory requirements.
What is Chapter 8?
Chapter 8 refers to Chapter 8 of the UK Traffic Signs Manual, which provides the guidance and specifications for temporary traffic management signing and layouts on public roads. It covers signing layouts, cone placements, signal distances, and equipment requirements for road works from minor footway repairs to motorway lane closures. Compliance with Chapter 8 is effectively mandatory for all road works traffic management in the UK.
Who is responsible for the TMP on a construction site?
Under CDM 2015, the Principal Contractor is responsible for preparing and maintaining the Construction Phase Plan, which must address traffic management. The Principal Contractor may appoint a specialist traffic management contractor to design and implement the TM scheme, but the Principal Contractor retains overall responsibility for ensuring the scheme is suitable and maintained throughout the project.
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