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Investment decision making


We have made improvements to our investment decision making system, in response to a 2015 review by the Ministry of Transport, Treasury and the NZ Transport Agency.

We want to simplify our stakeholders’ lives by making incremental improvements to the way we make investment decisions. One of the ways we are doing this is by redesigning the Investment Assessment Framework (IAF) in time for the 2018–21 NLTP.

The draft IAF provides more clarity and transparency around our investment criteria, and better aligns to the business case approach.

The draft IAF has been developed in line with the draft Government Policy Statement on Land Transport (GPS) for 2018/19 to 2027/28. 

Current progress

We engaged with the sector during March and April on the Draft IAF [PDF, 308 KB] and Applying the draft IAF to road maintenance [PDF, 380 KB].

We were really pleased with the amount of constructive feedback that came through. In total, we received 18 submissions that covered 8 regions and 54 local authorities.

The feedback received has led to the issuing of the second version of the draft IAF being approved by the NZ Transport Agency Board on 7 July.

Key documents

On 7 July 2017 the Transport Agency Board approved a revised draft Investment Assessment Framework, which includes the streamlined assessment approach to low cost/low risk activity below $1 million implementation cost.

The Investment Assessment Framework remains in draft until the GPS is finalised. We will continue to release supporting information and amend the set of frequently asked questions (FAQ) document to support practitioners through these changes.

The key documents below have been updated and re-released August 2017:

Assessment of business cases

For information on assessment of the business cases, please go to the links below:

  1. Assessment of road maintenance business cases
  2. Assessment of public transport services business cases
  3. Assessment of improvement activity business cases (and Road Safety Promotion business cases over $1 million)

Feedback received on the draft Investment Assessment Framework (IAF)

To view feedback received on the draft IAF and the responses provided by the Transport Agency, please go to the following link:

Contact us

Your feedback is important to us. Contact us if you’d like to know more or have some feedback.