TTM for Tree Work and Arborist Operations: A Guide for the Green Industry
Introduction
Tree work on or near public roads is one of the most common and yet most underestimated TTM scenarios in New Zealand. Falling limbs, chipper trucks blocking lanes, and crew working at height in close proximity to passing vehicles create a complex risk environment. Here is what arborists and tree care businesses need to know.
When Do Arborist Works Need a TMP?
Any time your arborist crew is working in or adjacent to the road corridor — including on overhanging trees where debris could fall onto the road — you need a compliant TMP approved by the relevant Roads Controlling Authority. This includes tree felling, limb removal, stump grinding, and chipping operations where the chipper truck is parked in a traffic lane or on a road shoulder.
Many arborist businesses are surprised to learn that private property work can still require a TMP if the tree or its branches overhang a public road. If there is any realistic prospect of material entering the road corridor, TTM is required.
With New Zealand transitioning from CoPTTM to the NZGTTM, arborist businesses should begin familiarising themselves with the new risk-based approach — the principles are the same, but the documentation and assessment requirements are evolving.
The Chipper Truck Problem
The chipper truck is often the biggest TTM challenge in arborist operations. It is large, it needs to be close to the tree, and it typically sits in a position that blocks part or all of a lane. Depending on the road speed and actual risk, a simple cone taper and pass-with-care setup may suffice — or a full lane closure with a Traffic Controller may be required. Under the NZGTTM’s risk-based framework, that decision must flow from a genuine site assessment, not habit.
Getting this wrong — operating a chipper in a lane without proper TTM — is one of the most frequently cited violations issued by councils to arborist businesses. A TMP is not optional once the truck is in the road.
Common Setups for Arborist Work
Traffic Management Aotearoa has prepared dozens of TMPs for arborist businesses across the Wellington region, working with clients including All About Trees Ltd, Arb Innovations Ltd, and independent operators. Common setups for arborist work include lane closures with cone tapers and pass-with-care signage for low-speed residential streets, attended Traffic Controller setups for busier roads where traffic needs active management, and short-duration road closures for works requiring full lane control during active cutting or rigging phases.
Many arborist TMPs qualify for a simplified process, which can be processed more quickly and at lower cost — but the correct approach depends on the road speed, traffic volumes, and the nature of the work.
Planning for Multiple Sites
Arborist businesses often work across multiple sites in a day or week. Traffic Management Aotearoa offers generic TMP options for routine arborist operations, which can cover pre-approved conditions for a range of standard setups. This approach reduces per-site approval costs and allows crews to move efficiently between jobs while maintaining full compliance.
For councils and arborist businesses interested in a generic TMP arrangement, TMA can advise on the appropriate scope and design a framework that meets RCA requirements.
Closing
Whether you need a single-site TMP for a large tree removal or a generic TMP covering your annual contract programme, Traffic Management Aotearoa has the expertise to keep your crew safe and your business compliant. Contact us today.
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Traffic Management Aotearoa specialises in designing compliant, practical TMPs for construction, events, and roadworks across New Zealand. Our experienced team handles everything from initial planning to Waka Kotahi approval.
