A2: Estimating visitor numbers at Cape Rodney Okakari Point Marine Reserve from car counters.
The survey described below resulted in the updated calibration figure of approximately 4.3 people per car.
Background The Department and Works and Infrastructure have installed various car counters across Goat Island Road for use in assessing visitor numbers to the CROP Marine Reserve. A value of 3.5 people per car has been used to extrapolate the car count data to estimate visitor numbers. This number was assessed some years ago by the Auckland Conservancy Rec Planner. This latest calibration exercise was conducted as part of a larger project to assess the economic value of the marine reserve to the Rodney District.
Method Survey data was collected on January 10th and 11th 2008 (Friday and Saturday) during fine weather with high visitor numbers. Data was collected for all vehicles departing the marine reserve between 4:19pm and 5:19pm on the 10th (93 vehicles) and all vehicles arriving between 9am and 4pm on the 11th (657 vehicles).
Data and analysis can be viewed DOCDM-246960. Location of the survey is shown in figure A1. Number of adults and children visible in each car were counted. Groups walking across the counter were also asked if they had driven over the counter (see figure A2). If the group had not driven over they were asked if they thought they would drive over the counter at any stage on this visit. If they answered “No” then the number of adults and children in the group were counted.
Figure A1. Survey was conducted from just north of the car counter (counter visible crossing the road at the culvert).