16 May 2026

Speed Limit Reductions, Safety Evidence, Revenue Consideration and Public Affordability

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speed-limit reductions and enforcement using safety an excuse to extract revenue

Subject: Official Information Act Request – Speed Limit Reductions, Safety Evidence, Revenue Consideration and Public Affordability

I request information under the Official Information Act 1982.

This request concerns speed-limit reductions, speed-management policy, the public use of the words “safe” and “safety”, and whether revenue generation, enforcement income, public affordability, and economic burden were considered in connection with those decisions.

The issue is not whether road safety matters. Plainly, it does. The issue is whether “safety” has been used as a blanket justification for speed-limit reductions and enforcement systems that also increase infringement exposure, fine revenue, surveillance, travel delay, and cost to ordinary New Zealanders. The public is entitled to know whether these decisions were genuinely evidence-based safety decisions, or whether safety language has been used to shield policies that also operate as revenue-producing or control-based measures.

For clarity, the public assertion that a measure is “for safety” does not answer the separate public-law question of whether revenue was forecast, expected, relied upon, incentivised, or treated as a practical benefit of the policy. If the decisions are genuinely safety-based and not revenue-driven, the agency should be able to produce the safety evidence, cost-benefit analysis, public-impact assessment, and records showing that revenue generation was not a purpose, factor, incentive, or expected outcome.

For the period 1 January 2020 to the date of this request, please provide the following information.

1. Decision records for speed-limit reductions

Please provide all final decision papers, briefings, reports, memoranda, recommendations, approvals, ministerial briefings, Cabinet papers, board papers, or senior decision-maker papers concerning:

a. reductions of speed limits on state highways or other roads;

b. national speed-management policy;

c. implementation of the Land Transport Rule: Setting of Speed Limits;

d. reversals, reviews, or reconsideration of speed-limit reductions;

e. the policy basis for reducing roads from 100, 90 or 80 km/h to 70, 60, 50, 40 or 30 km/h.

2. Safety evidence relied upon

Please provide all final or relied-upon records showing the safety evidence used to justify speed-limit reductions, including:

a. crash data;

b. death and serious injury data;

c. road-risk assessments;

d. speed-risk modelling;

e. engineering assessments;

f. school-zone safety assessments;

g. rural-road safety assessments;

h. evidence comparing safety outcomes before and after speed-limit reductions.

3. Records proving that “safety” was the actual basis

Because “safety” is repeatedly used as the public justification for speed-limit reductions, please provide all documents showing how the agency satisfied itself that the relevant reductions were genuinely necessary for safety, rather than merely assumed, policy-driven, revenue-producing, or imposed as a blanket measure.

Please include documents showing:

a. the evidential threshold required before a speed limit may be reduced;

b. how that threshold was applied;

c. whether each reduction was evidence-based or policy-driven;

d. whether alternatives were considered before reducing the limit;

e. whether the claimed safety benefit was measured, modelled, or assumed;

f. whether any post-implementation review confirmed that the safety benefit was actually achieved.

4. Revenue generation, fine income and financial incentives

Please provide all records, briefings, modelling, emails, reports, memoranda, forecasts, or financial papers referring to:

a. infringement revenue;

b. fine revenue;

c. speed-camera revenue;

d. enforcement revenue;

e. projected revenue arising from lower speed limits;

f. actual revenue before and after speed-limit reductions;

g. whether reduced speed limits increase the number of technical breaches by ordinary drivers;

h. whether revenue generation was considered, excluded, forecast, relied upon, or treated as an expected outcome.

If the agency’s position is that speed-limit reductions are not revenue-driven, please provide the records showing that revenue generation was expressly considered and ruled out as a purpose, factor, incentive, or expected benefit.

5. Cost-benefit analysis and public affordability

Please provide all records concerning the economic and public-cost impacts of speed-limit reductions, including:

a. cost-benefit analysis;

b. travel-time impact assessments;

c. freight impact assessments;

d. rural-driver impact assessments;

e. productivity assessments;

f. fuel-use assessments;

g. public affordability assessments;

h. impact on workers, tradespeople, low-income households, families, rural communities, transport operators, and small businesses.

6. Alternatives considered

Please provide all documents identifying alternatives to lowering speed limits, including:

a. road maintenance;

b. road widening;

c. signage improvements;

d. intersection redesign;

e. hazard removal;

f. lighting;

g. driver education;

h. targeted enforcement of genuinely dangerous driving;

i. warning-first systems;

j. engineering controls instead of blanket speed reductions.

7. Consultation and public opposition

Please provide all final consultation summaries, public-feedback reports, submissions analysis, community opposition records, and decision-maker advice concerning public support or opposition to speed-limit reductions.

Please also provide any documents showing how public objections were considered, accepted, rejected, or overridden.

8. Delegations and authority

Please provide the statutory provisions, delegations, warrants, authorisations, or internal authority relied upon by the persons or bodies who approved speed-limit reductions, speed-management plans, or related implementation decisions.

9. Reviews, criticism, reversals or concerns

Please provide all final reports, reviews, audits, internal concerns, ministerial concerns, Cabinet-level concerns, or agency assessments concerning whether previous speed-limit reductions were excessive, poorly evidenced, unpopular, economically harmful, revenue-producing, or inconsistent with current government policy.

10. Search and refusal clarification

This request is not seeking every internal email at this stage. It is directed to final, formal, relied-upon, decision-making, financial, evidential, and policy records.

If any part of this request is considered broad, please do not refuse it without first consulting me under section 18B of the Act.

If no documents exist for any category, please confirm that in writing.

If information is transferred to another agency, please identify exactly which part is transferred, to whom, and why.

Please also identify any information withheld, the statutory ground relied upon, and the public-interest considerations taken into account.

Yours faithfully,

Tracy lynch

MINISTRY OF TRANSPORT

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