The Challenge

The NZ Transport Agency provided road controlling authorities with a regional speed management map highlighting high benefit speed management opportunities across their network, however this does not necessarily capture the idiosyncrasies of individual corridors. Road controlling authorities are required to sense-check these maps, including reviewing the accuracy of the underlying data and ensuring the high benefit opportunities align with local transport strategies and community views. 

As part of a district-wide review of speed limits, the Council approached Abley to review their high-benefit speed management opportunities and development implementation plans for each high-benefit opportunity corridor. 

The Solution

Using our knowledge of the Speed Management Framework and Safer Journeys Risk Assessment Tool, we developed a revised list of speed management opportunities in the district, focused on reducing death and serious injuries according to the Council’s strategic priority.  

This included: 

Corridor implementation plans were developed for 13 sites. The development of these plans included site surveys and the assessment of treatment options, including education and enforcement strategies to support speed limit reductions. The plans included schematic plans and commentary on the appropriateness of different treatment options. 

Following the district wide review, Abley undertook site surveys, assessed treatments options and developed corridor implementation plans for 13 sites. For each site Abley completed a comprehensive site visit to validate physical attributes as well as the appropriate location for speed management /need for ancillary changes before producing schematic plans of the recommendations.  The Council used these plans to supplement their engagement and consultation activities, seeking feedback from interested parties and mitigating the risks of design objections during delivery.  They are currently in the process of implementing the recommendations. 

A technical document was produced to support the proposal for each site, which included commentary on the Council’s speed management strategy and why Council is using this strategy to contribute to improving safety on their network. Each site will have a subsection that will have details of the proposed treatment and a rationale of anticipated outcomes. The location for traffic counts will be included for each site so Council can organise these surveys before implementation. The engineering treatments will be based on best practice speed management interventions and include education and enforcement strategies, the blend of which produces optimal value for money outcomes.  Following the CCC review, Abley were engaged by Queensland and Central Otago District Councils to review their networks. 

The Outcome

The network review and corridor implementation plans greatly assisted in the Council’s assessment of high-benefit opportunities. The information and plans provided to the Council were used to support their  engagement and consultation activities.