Preventing Plant and Vehicle Collisions on Irish Construction Sites: Traffic Management and Segregation

How do you prevent plant and vehicle collisions on Irish construction sites? A practical guide to traffic management plans, segregation of plant from...

Being struck by moving plant or vehicles is one of the leading causes of fatal accidents on Irish construction sites. Excavators reversing, dumpers moving through congested site roads, delivery lorries backing into loading areas, and telehandlers slewing with loads overhead — the potential for a catastrophic collision is present on almost every active construction site. Yet the control measures required to prevent these accidents are well understood, and most of them are straightforward to implement.

The problem is not a lack of knowledge about what needs to be done. The problem is that traffic management on construction sites is often treated as an afterthought, something to be sorted out once the project is underway rather than planned before it starts. By the time the site is busy, the traffic routes are already established by habit, the pedestrian routes are wherever workers happen to walk, and the banksmen are wherever they happen to be standing. Changing this once the project is underway is difficult. Getting it right from the start is much easier.

This post covers the legal requirements for traffic management on Irish construction sites, the key elements of a site traffic management plan, and the practical steps that PSCS holders and site managers need to take to prevent plant and vehicle collisions.

The Legal Framework

The primary legislation governing traffic management on Irish construction sites is the Safety, Health and Welfare at Work (Construction) Regulations 2013 (S.I. No. 291 of 2013). Regulation 16 requires the PSCS to ensure that the construction site is managed and organised in a manner that ensures the safety, health, and welfare of persons at work. Schedule 3 of the Construction Regulations sets out specific requirements for traffic routes and vehicle movements on construction sites.

Schedule 3 requires that traffic routes are organised so that pedestrians and vehicles can move safely. It requires that vehicles and pedestrians using the same route are separated where possible. It requires that traffic routes are clearly indicated and that appropriate signs and signals are used. And it requires that vehicles are prevented from falling into excavations, water, or other hazards.

The Safety, Health and Welfare at Work Act 2005 imposes a general duty on employers to provide a safe place of work and safe systems of work. A construction site where plant and pedestrians share the same routes without adequate segregation does not meet this standard.

The Site Traffic Management Plan

Every construction site should have a written Site Traffic Management Plan (STMP) that is prepared before work begins and updated as the project progresses. The STMP should be part of the Construction Phase Safety and Health Plan prepared by the PSCS.

A Site Traffic Management Plan should address:

Site access and egress: The location of site entrances and exits, the arrangements for controlling access to the site, and the procedures for managing deliveries. Where possible, separate entrances and exits should be provided for plant and vehicles and for pedestrians.

Internal traffic routes: The routes that plant and vehicles will use within the site, the maximum speed limits, and the locations of any one-way systems. Traffic routes should be designed to minimise the need for vehicles to reverse, and where reversing is unavoidable, banksmen should be provided.

Pedestrian routes: The routes that workers and visitors will use to move around the site, and the measures in place to segregate pedestrians from plant and vehicles. Pedestrian routes should be clearly marked, physically separated from vehicle routes where possible, and protected by barriers or fencing where they are adjacent to vehicle routes.

Loading and unloading areas: The designated areas for loading and unloading vehicles, the arrangements for controlling access to these areas during loading and unloading operations, and the procedures for managing deliveries.

Banksman arrangements: The activities for which banksmen will be provided, the competency requirements for banksmen, and the procedures for banksmen to follow when directing plant and vehicles.

Signage and road markings: The signs, signals, and road markings that will be used to indicate traffic routes, speed limits, pedestrian crossings, and hazard areas.

Segregation of Plant from Pedestrians

The most effective way to prevent plant and vehicle collisions with pedestrians is to keep them apart. Physical segregation using barriers, fencing, or clearly marked exclusion zones is more reliable than relying on workers to stay out of the path of moving plant.

On large sites, it may be possible to establish completely separate zones for plant operations and for pedestrian access. On smaller or more congested sites, this may not be possible, and other measures will be needed to manage the interface between plant and pedestrians.

Where plant and pedestrians must share the same area, the following measures should be considered:

Banksmen should be provided to direct plant movements and warn pedestrians. The banksman must be clearly visible to the plant operator and must have a clear view of the area around the plant. The banksman must not be in a position where they could be struck by the plant they are directing.

Plant should be fitted with reversing alarms and, where appropriate, cameras to improve the operator's visibility. However, reversing alarms and cameras are not a substitute for banksmen; they are supplementary measures.

Speed limits should be set and enforced. On most construction sites, a maximum speed of 10 km/h is appropriate for plant and vehicles. Speed humps or other traffic calming measures can be used to enforce speed limits on internal site roads.

Exclusion zones should be established around excavations, cranes, and other high-risk areas. These zones should be clearly marked and physically protected where possible.

Managing Deliveries

Deliveries are a particularly high-risk activity on construction sites. Delivery vehicles are often driven by people who are unfamiliar with the site, who may be under time pressure, and who may not be aware of the hazards present. The following measures should be in place for managing deliveries:

All delivery drivers should receive a site induction before they are allowed to drive on the site. The induction should cover the site traffic management plan, the speed limits, the designated delivery areas, and the emergency procedures.

Deliveries should be scheduled to avoid peak periods of site activity where possible. Deliveries should not be accepted outside of designated delivery hours.

A banksman should be provided to guide delivery vehicles to their designated unloading area and to supervise the unloading operation.

What the HSA Looks For

When the HSA inspects a construction site, traffic management is one of the areas they examine closely. They will look for evidence of a written Site Traffic Management Plan, clearly marked and physically separated traffic and pedestrian routes, appropriate signage and speed limits, banksmen for reversing operations, and a site induction process that covers traffic management.

A site where plant and pedestrians share the same routes without adequate segregation is a serious finding that is likely to result in an improvement notice or a prohibition notice. The HSA takes struck-by incidents very seriously, and they will not accept assurances that "it has never been a problem" as a substitute for proper traffic management.

Conclusion

Preventing plant and vehicle collisions on construction sites requires a written Site Traffic Management Plan, physical segregation of plant from pedestrians where possible, banksmen for reversing operations, and a site induction process that covers traffic management. These measures are not complicated, but they require planning before the project starts and consistent enforcement throughout the construction phase. If you are a PSCS or a site manager and you are unsure whether your traffic management arrangements meet the requirements of the Construction Regulations 2013, contact Safety Check for a review.