Sensys Stud Trial - Sensys Networks
Sensys Stud Trial - Sensys Networks
Sensys Stud Trial - Sensys Networks
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
<strong>Sensys</strong> <strong>Stud</strong> <strong>Trial</strong><br />
Executive Summary<br />
Transfield Services along with New Zealand Transport Agency undertook a trial of the<br />
<strong>Sensys</strong> Wireless Vehicle Detection System (<strong>Sensys</strong> studs) on Auckland’s motorway<br />
carriageway.<br />
The trial involved installing six <strong>Sensys</strong> studs at Penrose on the Southern Motorway, one pair<br />
on each of the three northbound lanes. These studs were connected wirelessly to an<br />
access point strapped to a roadside CCTV camera pole, and further connected, via network<br />
cables, to the two networks inside the roadside cabinet, namely the TDM Ethernet Network<br />
and the SCATS network.<br />
Data from the <strong>Sensys</strong> was collected through these two systems as part of the trial. Two<br />
tests were carried out:<br />
1. The <strong>Sensys</strong> data collected via the SCATS network was compared with traditional<br />
inductive loops for Occupancy and Count. The count average for these results gives<br />
an average difference of 2.07% while the occupancy gives an average difference of<br />
6.28%<br />
2. Manual counts have also been undertaken to verify flow data from both <strong>Sensys</strong> and<br />
inductive loops. The manual count showed that the <strong>Sensys</strong> counts were on average<br />
1.5% different than actual counts and the difference for loops was 0.5%<br />
Cost analysis has been undertaken showing the cost difference between inductive loops and<br />
<strong>Sensys</strong> studs, this was provided to the New Zealand Transport Agency by Transfield<br />
Services.<br />
Commercial in Confidence Page 2