Sensys Stud Trial - Sensys Networks

Sensys Stud Trial
1. Summary of Results
This document details the trial that was carried out of the Sensys studs on the Auckland
motorway system. Extensive testing has also been carried out for various agencies in
Australia. Results of both tests are summarised below.
It should be noted that loop data cannot be treated as true values even though loop data
was used in this report as reference data. True values can only be established by manual
counts
1.1 Summary of Results from New Zealand Tests
The testing in New Zealand occurred on 2 separate days. The 1 st test was a direct
comparison between inductive loops and Sensys studs, while the second compared actual
counts from a video camera with the 2 different technologies.
When the Sensys data collected via the SCATS network was compared with traditional
inductive loops for Occupancy and Count, the count average for these results gives an
average difference of 2.07% while the occupancy gives an average difference of 6.28%
When the manual counts were compared it showed that the Sensys counts were on average
1.5% different than actual counts compared with a 0.5% difference for loops.
From the data gathered in New Zealand we can conclude that:
• The counts from the Sensys studs were 1% less accurate that those from inductive
loops when compared to actual counts.
• Occupancy data from the Studs was 6% higher than the data given by the inductive
loops when connected to SCATS
1.2 Summary of Results from Australian Tests
This section summarises the testing that has already been carried out by Vic Roads, Main
Roads WA, Department of Transport, Energy and Infrastructure SA, and Queensland
Department of Main Roads. These tests involved 3 Stages: Stage 1 involved laboratory
testing, Stage 2 controlled field tests and Stage 3 on-site tests
In summary the report found that the Sensys dectector showed a performance comparable
to that of inductive loops and should be suitable for real-time traffic applications.
The following are excerpts for the report produced by ‘ARRB Group Ltd’:
Commercial in Confidence Page 4