The New Zealand Guide to Temporary Traffic Management (NZGTTM) is the current national risk-based guide replacing CoPTTM through a staged transition. Contracts, road controlling authorities and principals may still refer to older CoPTTM material, so confirm the live requirements that apply to each job.
What Was CoPTTM?
The Code of Practice for Temporary Traffic Management (CoPTTM) was the previous standard that governed temporary traffic management in New Zealand. While it served the industry well for many years, it was based on older traffic management principles and did not fully reflect modern traffic conditions, vehicle technologies, and safety research.
What is NZGTTM?
NZGTTM provides a national risk-based framework for planning, designing, implementing and reviewing temporary traffic management. It shifts the focus from copying prescriptive layouts to explaining how the selected controls manage the real risks of the activity and road environment.
Key Differences Between NZGTTM and CoPTTM
Risk Based Approach
The most significant change is the shift to a risk based approach. While CoPTTM used a relatively prescriptive method based primarily on road category and traffic speed, NZGTTM requires a more comprehensive risk assessment that considers:
- Traffic volume and composition
- Road user types (including vulnerable users)
- Road geometry and sight distances
- Duration of works
- Time of day and day of week
- Environmental conditions
- Work site characteristics
This risk based approach allows for more tailored traffic management solutions that better address the specific hazards of each work site.
Worker Safety Zones
NZGTTM places greater emphasis on worker safety through the introduction of more clearly defined work zone areas:
Advance Warning Area: Drivers are alerted to upcoming changes. Transition Area: Traffic is redirected around the work site. Buffer Space: A protected area is kept between traffic and the work space. Work Space: This is where the actual work takes place. Termination Area: Traffic returns to normal flow.
Safety and work-space decisions should be justified from the actual speed, geometry, road users, activity, equipment and consequence of an intrusion rather than assumed from a generic label.
Signs, devices and technology
Device selection should follow the assessed risk, approved TMP and any RCA, principal, contract or product requirements. Matters to check include:
- Whether each sign clearly communicates the intended message
- How any temporary speed approach is justified and authorised
- Safe setup, operation and contingency for portable signals
- Whether smart technology is suitable and supportable on site
- Condition, visibility and suitability of signs and devices
Training, competency and assigned functions
NZGTTM separates functions and puts responsibility on the PCBU to confirm competency for the work assigned. Evidence may include:
- Training relevant to the planning or operational function
- Practical assessment and observed performance
- Recent experience, supervision and review records
- Specialist support for complex or higher-consequence work
Do not assume one national transition date or credential resolves every assignment. Check the current NZTA guidance plus the RCA, principal and contract requirements for the work.
Digital TMP and submission requirements
Submission format and system requirements vary by RCA and client. Before preparing the package, confirm matters such as:
- Accepted drawing and document formats
- Location accuracy and site-plan detail
- The current RCA submission system and reference numbers
- Controlled distribution of the accepted plan and changes
Vulnerable Road Users
NZGTTM significantly expands the requirements for managing vulnerable road users including pedestrians, cyclists, and motorcyclists. This reflects the growing emphasis on active transport in New Zealand and the recognition that these road users face disproportionate risks in work zones.
What This Means for Your Projects
If work affects a road corridor, check that:
1. Your TMP designer is qualified under NZGTTM 2. Your STMS holds current NZGTTM aligned qualifications 3. Your traffic management equipment meets NZGTTM standards 4. Your TMP addresses the risk based requirements 5. You allow adequate time for TMP design and approval
How TM Matters supports risk-based planning
TM Matters uses a risk-based planning process and maintains competency evidence relevant to the functions and work undertaken. We help clients align the work method, TMP, CAR/WAP information, site controls and responses to RCA comments. Final acceptance remains with the relevant road controlling authority.
Contact us to discuss NZGTTM-aligned planning, TMP design, CAR/WAP support or Canterbury field traffic management for your project.
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