Dear New Zealand Transport Agency,

Under the Official Information Act, I request all information held by Waka Kotahi NZ Transport Agency relating to the assessment and modelling of traffic flows at the Cambridge Southern Interchange on the Waikato Expressway.

This request covers information used to justify decisions not to upgrade the interchange to full access, including but not limited to:

1) When NZTA conducted its most recent traffic flow modelling relevant to the Cambridge Southern Interchange.

2) Where the traffic data used in that modelling was sourced from (including specific traffic counts, third-party datasets, or local authority data).

3) Population growth models for Cambridge used in that modelling, including the source of those projections and the version/date of the dataset.

4) Any modelling assumptions, reports, and methodology notes relating to the Cambridge Southern Interchange, including assessments comparing its location to the Victoria Road interchange.

5) Any analysis or examples NZTA has considered when citing that the Cambridge Southern Interchange is "too close" to Victoria Road interchange and would result in mainly local traffic as reported https://www.cambridgenews.nz/2025/08/ups... . Including comparisons to interchange spacing elsewhere in the Waikato Expressway or Hamilton area.

6) Copies of any NZTA/Waka Kotahi policies, guidelines, or criteria relied upon when determining whether to upgrade the Cambridge Southern Interchange to a full access interchange.

Yours faithfully,

AJ