6.2 Site Traffic Management, Pedestrian-Vehicle Segregation & Delivery Logistics

Workplace Transport Hazards in Construction

Workplace transport accidents remain one of the leading causes of fatalities, major amputations, and catastrophic injuries on UK construction sites. According to HSE statistics, incidents involving moving vehicles—such as excavators, forward-tipping dumpers, telehandlers, and heavy goods vehicles (HGVs)—account for approximately 20% of all site fatalities annually. Common incident mechanisms include workers being struck or run over by reversing plant, operatives crushed between vehicles and fixed structures, vehicles overturning on embankment slopes, and falls from vehicle loading beds during unstrapping operations.

Statutory requirements for managing transport safety are established under CDM 2015 Regulation 27 and Schedule 3 (Workplace Transport Safety), alongside Regulation 17 of the Workplace (Health, Safety and Welfare) Regulations 1992. These regulations place a strict duty on site managers and Principal Contractors to organize construction sites so that vehicles and pedestrians can move safely without risk to health.

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Principles of Pedestrian-Vehicle Segregation

The primary principle of site traffic management is complete physical segregation of pedestrians and vehicles. Relying on administrative rules or high-visibility clothing alone is insufficient. Site management must establish robust physical controls:

1. Physical Separation Barriers

• Rigid Barrier Systems: Pedestrian routes alongside vehicle roads must be protected by heavy-duty rigid barriers—such as interlocking steel fencing, concrete Jersey barriers, or Armco crash barriers. Plastic water-filled barriers or flexible barrier tape are unsuitable along heavy vehicle routes as they offer zero physical impact protection.
• Clear Footpaths & Surfaces: Walkways must be well-drained, firm, free from tripping hazards or debris, and adequately lit during darkness or winter working hours.

2. Pedestrian Access & Crossing Points

• Dedicated Pedestrian Entrances: Pedestrians must enter the site via dedicated turnstiles or pedestrian gates separated by physical hoarding from vehicle access gates.
• Controlled Crossing Points: Where footpaths cross vehicle routes, crossing points must be clearly designated with drop-bars, high-visibility signage, non-slip rubber matting or zebra markings, and clear sightlines. Pedestrians must be given clear right-of-way priority.

3. Personal Protective Equipment (PPE)

All personnel entering active traffic zones must wear High-Visibility Clothing complying with BS EN ISO 20471 (Class 2 waistcoats or Class 3 long-sleeved jacket/trouser combinations in retro-reflective orange or yellow). High-visibility PPE serves as a final line of defense to enhance conspicuity but never substitutes for physical segregation.

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Designing Safe Site Traffic Routes

Traffic management must be designed during the pre-construction planning stage and detailed within the Site Traffic Management Plan (TMP).

Key Route Layout Standards

• One-Way Circulation Systems: Sites should establish one-way traffic circuits wherever space permits. One-way systems eliminate head-on vehicle conflicts and drastically reduce the need for reversing.
• Speed Management: Site speed limits must be set low—typically 5 mph or 10 mph depending on site conditions. Speed limits must be enforced using speed humps, clear signage, and radar speed displays.
• Gradient and Surface Conditions: Haul roads must be constructed on stable foundations, regularly graded to remove ruts and potholes, and dampened with water suppression tankers during dry periods to control dust emissions.
• Overhead Hazard Protection ("Goalposts"): Where traffic routes pass beneath overhead electric power lines or low overhead structures, rigid non-conducting warning structures ("Goalposts") equipped with bunting and high-visibility danger signs must be erected at defined warning distances to prevent boom or tipper body strikes.

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Vehicle Reversing & Vehicle Marshal (Banksman) Controls

Vehicle reversing is the single highest-risk transport maneuver on construction sites. The control of reversing must follow a strict statutory risk hierarchy:

Hierarchy of Reversing Control Measures:
1. ELIMINATE reversing entirely (One-way systems / drive-through loading bays)
2. MINIMIZE reversing distances and frequency (Turning circles / drive-in bays)
3. PROVIDE visibility aids & engineering controls (360° cameras, white-noise alarms, radar sensors)
4. UTILIZE trained Vehicle Marshals / Traffic Marshals in designated safe zones

Vehicle Marshals (Traffic Banksmen)

Where reversing cannot be eliminated, it must be directed by a qualified Vehicle Marshal (Traffic Banksman) holding a valid CPCS or CSCS Traffic Marshal card:

• Position of Safety: The marshal must remain in constant clear sight of the driver at all times while positioned in a safe location outside vehicle blind spots and turning radiuses.
• Stopping Movement: If the driver loses sight of the marshal, the driver must immediately STOP the vehicle.
• Standardized Hand Signals: Marshals must use official BS 6736 hand signals or two-way radio communication.

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Delivery Logistics & Loading/Unloading Safety

Unmanaged HGV deliveries cause off-site traffic congestion, public hazards, and severe on-site loading accidents.

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Workplace Transport Control Measures Matrix