Wavetronix SmartSensor Matrix (SS-225) - User Guide - Manual (Page 9)

8 INTRODUCTION • SMARTSENSOR MATRIX USER GUIDE
140 ft Sensor Pole
140 ft
Figure I.3 – Corner Radar
˽ Line of sight – Position the sensor so that it will be able to detect the entire area of
interest. Avoid occlusion by installing the sensor away from trees, signs and other road-
side structures.
˽ Detection coverage – Position the sensor so that it will be able to reach all the specified
stop bar detection zones. The sensor will often work better if you position it so that it
tracks vehicles for several feet before the first zone in each lane. If the sensor has a view
several feet beyond the stop bar, it is more likely to accurately detect queue dissipation.
˽ Closest roadside – Mount the sensor on the side of the road closest to the lanes of pri-
mary interest. Always mount the sensor high enough to prevent traffic from occluding
approaching vehicles.
˽ Mounting height – A minimum height of 12 ft. (3.6 m) is recommended. Mounting
the sensor higher will generally improve line of sight and decrease the possibility of
occlusion.
˽ Mounting offset – A minimum offset of 6 ft. (1.8 m) to the first lane of interest is
required.
˽ Redundant detection – It is possible to have multiple sensors monitoring the same
approach. Multiple sensors are needed when zones are spread over more than 140 ft.
(42.7 m).
˽ Sensor proximity – When multiple sensors are mounted at the same intersection, inter-
ference can be avoided by configuring each sensor to operate on a unique RF channel.
˽ Departing lanes – There is usually no need to view traffic in departing lanes or to con-
figure departing lanes. However, if they are configured, then the stop bar should not
be configured.
˽ Suspended electrical cables – The sensor is designed to work in the presence of sus-
pended power lines and other electrical cables. However, these cables should be at least
10 ft. (3 m) away from the front of the sensor.
˽ Neighboring structures and parallel walls – The sensor should not be mounted with
signs or other flat surfaces directly behind it. This will help reduce multiple reflection