Blue Pools, Mount Aspiring National Park, Otago.

The Department of Conservation recently undertook a review of the effectiveness of its safety signage on load-restricted structures, such as suspension bridges and platforms. Anecdotal reports suggested that signage at some sites was at times being ignored, and subsequent investigation confirmed that the signage was not consistently performing as intended. This resulted in a project to identify a signage convention that would result in higher rates of visitor compliance.

Once the new signage convention was selected, DOC needed to undertake a field trial of the new signage to see how effectively it influenced visitor behaviour, and determine whether or not it was more effective than the standard DOC signage convention. This evaluation required a method to consistently and inconspicuously monitor the trial site without the cost or distraction of having DOC staff undertake observations.

The Department of Conservation enlisted the services of Track Me NZ Ltd and Perimeter Security, to find a solution.

The project scope needed to address the following:

  1. Capture images of walkers approaching the bridge, to see if they were looking at the sign.
  2. Capture images of persons on the bridge to see if the sign was being adhered to.
  3. Be able to download the data for analysis.

A bespoke solution was engineered to achieve the requirements.

  1. Two cameras were employed with line crossing detection.
  2. The line crossing detection triggered the photos to be taken at given intervals.
  3. The system is self-powered with up to four days of standby capacity to limit down time.
  4. The system was engineered to be vandal proof but easy to maintain by DOC.

Blue Pools Approach Camera

Blue Pools Bridge Camera