Traffic management plan builder

Why a site traffic management plan gets asked for

Being struck by a moving vehicle is one of the biggest killers in construction. Most of these deaths happen on the site itself — a worker on foot crushed by a reversing lorry, a telehandler, a dumper or an excavator slewing round. Because of that, a written traffic management plan is one of the first things a principal contractor, client or HSE inspector will ask to see, and it is a normal condition of getting plant and deliveries onto a site at all.

It is not just good practice. The Construction (Design and Management) Regulations 2015 require sites to have defined traffic routes and to be organised so that, where reasonably practicable, pedestrians and vehicles can move safely and separately. HSE's construction vehicle guidance treats keeping people on foot apart from dumpers, telehandlers and other plant as a legal duty — not an optional extra for large jobs.

Segregate — don't "manage"

The single most important idea behind a good plan is to design the conflict out rather than ask people to watch out for each other. A physical barrier, a separate walkway and a separate gate for people will always beat painted lines, signs and good intentions. Signage and supervision matter, but they are the last line of defence, not the first. When you find yourself relying on someone spotting a hazard in time, look again at whether you can simply keep the two apart.

Segregation also has to be maintained, not just drawn. Where barriers get climbed over or shortcuts across vehicle routes become normal, the plan has quietly stopped working — which is why monitoring and enforcing the routes is part of the job, not a one-off setup task.

Reversing is the highest-risk movement

If there is one movement to design out, it is reversing. Drivers cannot see directly behind a large vehicle, and reversing is consistently among the most common ways people are struck. The order of priority is: remove the need to reverse (a one-way system, a drive-through, or a proper turning area); then, for any reversing that remains, control it with a trained banksman kept safely in the driver's view, reversing cameras and alarms, and an exclusion zone behind the plant. A marshal is a control of last resort — and one who has to stand in the danger area to do the job is a sign the layout still needs fixing.

What to put in the plan

Cover who coordinates traffic on site and what plant is present; how pedestrians are segregated; how reversing is removed or controlled; where deliveries arrive, wait and unload; the everyday rules (speed limit, parking, keys-out, hi-vis); the interface with the public and the highway; and the controls tied to specific machines (quick-hitch checks, seatbelts, slew exclusion zones, overhead-service and height restrictions on routes). A traffic management plan should always include a drawing — a marked-up site plan showing routes, one-way directions, crossings, gates and exclusion zones.

For more detail, see HSE's workplace transport pages (hse.gov.uk/workplacetransport) and its construction vehicles guidance (hse.gov.uk/construction/safetytopics/vehicles).