The following description was taken from Managing Work Site Traffic by WorkSafe New Zealand:

Work site traffic can be a major cause of harm to workers and other people at work sites.

These guidelines are for any person conducting a business or undertaking (PCBU) who manages a work site where there are vehicles or mobile plant operating, or whose workers carry out work at a work site where there are vehicles or mobile plant operating. It may also be useful for workers, health and safety professionals, or traffic management consultants who are providing traffic management advice to PCBUs.

These guidelines provide advice on ways to manage traffic-related risks for workers and other people at work sites. It provides examples of commonly used control measures and when they might be appropriate to use. The guidance is grouped into five main areas:
– general risk management principles
– safe work site (design and activity)
– safe vehicles
– safe people
– work site induction and traffic management plans.