The section of SH73 covered by this Study has been subdivided into six continuous sub-sections, as shown in the project map (PDF, 3.31 MB) and described in the summary table (PDF, 37 KB). The table also summarises the typical issues and Management Strategy to be adopted for each section.
The proposed Corridor Management Plan has been developed to manage risk along SH73 within the constrained funding that is available and is based on the ‘DNA’ principle of Detect, Notification, and Action.
- Detect and Identify risks to road users, route security and the environment through monitoring and surveillance by the Network Consultant and Contractor.
- Notify risks to NZTA State Highway Manager and affected Stakeholders as appropriate.
- Action Plan development including emergency response plans, investigation of highest risk sites, exposure and hazard reduction plans. See the Investigate, design and construct process for the process to be adopted for determining appropriate action.
Some of the ways in which hazard and exposure can be reduced comprise the following:
- Increase driver awareness e.g. through signage.
- Install more warning signs e.g. No Stopping, Rock Fall.
- Develop early warning systems for drivers and have response plans in place for the various hazard scenarios, including road closures and diversions when warranted.
- Close off rest areas or lay-bys in areas of increased exposure.
- Consider traffic management systems to remove road users from areas of greatest risk.
- Where physical works are needed to reduce the hazard, this could be in the form of:
- Improve drainage (rainfall and high ground water most common cause of instability).
- Preventative maintenance to protect the road (engineered solution such as rockfall netting).
- Realignment of the road away from the hazard.
Last updated: 12 November 2009
