- Primary guidance
- Traffic Signs Manual Chapter 8 (Parts 1 and 2), published by Department for Transport
- Chapter 8 Part 1 scope
- Design principles and guidance for traffic signs and road markings at road works
- Chapter 8 Part 2 scope
- Operations, including signing layouts for specific road types and work situations
- Statutory instrument
- Traffic Signs Regulations and General Directions 2016 (SI 2016/362) prescribes sign designs, sizes, and placement
- Duty to sign road works
- New Roads and Street Works Act 1991 Section 65 requires adequate signing, lighting, and guarding at all street works
- Speed restriction powers
- Road Traffic Regulation Act 1984 provides powers for temporary speed restrictions at works
- Penalty for inadequate signing
- Failure to comply with Section 65 NRSWA 1991 is a criminal offence punishable by fine
- Temporary traffic signals
- Required when road width at works is reduced below safe two-way passing; must comply with TSRGD 2016 Schedule 14
- Portable traffic signals
- Must be approved type; manual operation required where detection equipment cannot be used effectively
- Multi-way signals
- Require specific highway authority approval before installation
- Temporary speed limits
- Highway authority may impose temporary speed limits of 20, 30, 40, or 50 mph at works under RTRA 1984
- High-speed roads (50+ mph)
- Mandatory use of Chapter 8 Part 2 signing layouts; advance warning signs required at minimum distances set out in Chapter 8
- Safety zone requirement
- Minimum clearance zone between working space and live traffic; dimensions depend on road speed limit
- Traffic management plan requirement
- Required for all works affecting traffic flow; must be submitted with permit application or notice
- Plan must include
- Signing layout, phasing, diversion routes (if applicable), pedestrian and cyclist provisions, risk assessment
- Approval authority
- Local highway authority (local roads) or National Highways (strategic road network)
- Works on motorways and trunk roads
- Must comply with National Highways standards; traffic management design must be approved by National Highways
- Signing and guarding categories
- Category A (minor works, footway only), Category B (works on carriageway with minor impact), Category C (works requiring significant traffic management)
- Cones and delineators
- Minimum height 450 mm (roads up to 30 mph), 750 mm (roads 40-50 mph), 1,000 mm (roads above 50 mph)
- Barriers and guarding
- Required around all excavations; must include retroreflective markings and lighting in hours of darkness
- Warning lamps
- Steady or flashing amber lamps required at road works during hours of darkness and poor visibility
- Qualified operatives requirement
- All traffic management operatives must hold appropriate Sector Scheme qualifications
- Sector Scheme 12AB
- Qualification for operatives installing, maintaining, and removing temporary traffic management on roads with speed limits up to 40 mph
- Sector Scheme 12D
- Qualification for operatives on dual carriageways and roads with speed limits above 40 mph, including motorways
- National Highways Sector Scheme 12D
- Mandatory for all traffic management operations on the strategic road network (motorways and trunk roads)
- Operative registration
- All operatives must be registered with an NHSS-accredited provider and carry proof of qualification
- Pedestrian provision
- Safe pedestrian routes must be maintained throughout works; minimum footway width 1.0 m (1.2 m preferred)
- Pedestrian barriers
- Mandatory pedestrian barriers where footway is narrowed or diverted; must include tapping rail for visually impaired users
- Cyclist provision
- Cycle lanes must be maintained or suitable alternative routes signed; consideration of contra-flow cycling
- Accessibility
- Temporary routes must be accessible for wheelchair users, pushchairs, and mobility scooters; ramps where kerb level changes
- Night-time works requirements
- Enhanced signing and lighting required; all cones, barriers, and signs must have Class RA2 retroreflective markings
- High-speed road requirements (national speed limit)
- Lead-in taper minimum 100 m; advance warning signs at 200 m, 400 m, and 800 m from works
- Motorway requirements
- Full Chapter 8 Part 2 compliance; approved traffic management contractor required; all layouts require National Highways approval
- Dual carriageway lane closures
- Taper lengths calculated by speed limit; minimum 45 cones for 60 mph taper on single lane closure