Sensys Stud Trial - Sensys Networks
Sensys Stud Trial - Sensys Networks
Sensys Stud Trial - Sensys Networks
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<strong>Sensys</strong> <strong>Stud</strong> <strong>Trial</strong><br />
Stage 1 concluded that the <strong>Sensys</strong> detector is a well-designed and reliable detector under a<br />
wide range of environmental conditions experienced in Australian cities. Stage 2 concluded<br />
that, relative to inductive loops, <strong>Sensys</strong> counts were similar and that it was worthwhile to<br />
move on to Stage 3 on-site tests. Stage 2 further reported that the sensitivity of a vehicle<br />
detector making use of earth’s magnetic field is strongest at the south (or north) pole but<br />
decreases towards the equator. Following from the results of Stages 1 and 2, a freeway test<br />
site was selected near the Forster Road on- and off-ramps with the Monash Freeway in<br />
Mount Waverley, Melbourne.<br />
Stage 3 on the Monash Freeway in Melbourne compared the <strong>Sensys</strong> studs with inductive<br />
loops and manual counts obtained from video recording. The key findings were:<br />
• The data quality of occupancy and volume from the <strong>Sensys</strong> studs are comparable to<br />
loop data quality. The speed data was more susceptible to vehicles changing lanes<br />
as the data is from a pair of sensors.<br />
• <strong>Sensys</strong> volume data was compared to manual counts and was found to be 2% larger<br />
than true counts. The results are shown below:<br />
Traffic<br />
Parameters<br />
Mean<br />
Difference<br />
0.3 veh/min<br />
(Dry Days)<br />
Volume 0.42<br />
veh/min<br />
(Wet Days)<br />
Daily Levels<br />
Mean %<br />
Difference<br />
2%<br />
(Dry Days)<br />
3%<br />
(Wet Days)<br />
Mean<br />
Difference<br />
0.31<br />
veh/min<br />
1 min Level<br />
Mean %<br />
Difference<br />
Occupancy -1.20% -11% -1.10% -10%<br />
Speed - - 1.29 km/h 1%<br />
2%<br />
• The detection zone of the <strong>Sensys</strong> stud is smaller than that of an inductive loop<br />
detector due to physical size and technology used. The data analysis shows that at a<br />
1 minute level the ratio of <strong>Sensys</strong> occupancy to loop occupancy is 0.713<br />
• No significant difference was found between wet and dry days.<br />
• There was a strong linear relationship between 2 detectors in a lane.<br />
• Some sensor downtime was experienced however this was not quantified.<br />
.<br />
Commercial in Confidence Page 5