Selecting a Site for the Speed Tracker
Selecting a Site for the Speed Tracker
The site you select for the Speed Tracker may vary with the application in which it is being used. However,
you should generally adhere to the following guidelines:
»
Choose a location where the line of sight from the Speed Tracker to the vehicles being counted will be
uninterrupted. Give consideration to how the location may develop with time. The following types of
questions should be considered:
•
Will any trees grow directly in the line of vision?
•
Is it likely that road traffic signs will be erected in a position that could obstruct the field of view?
•
For solar-powered versions, are the solar panels likely to be blocked by any trees or other
structures?
»
Install the Speed Tracker directly adjacent to the lane of traffic being targeted since an interfering lane
of traffic may cause inaccurate speed readings.
»
Mount the Speed Tracker to a stable and firm structure. Avoid structures that are likely to be affected
by wind or rain.
»
The Speed Tracker and optional solar panel should optimally be mounted on a 12-foot to 14-foot pole.
We suggest that you use a 4-inch to 5-inch diameter circular metallic pole, ideally, or a 4-inch × 4-inch
wooden pole. For ‘Telespar’ poles, we strongly recommend that you use the 2-inch variety.
Positioning the Speed Tracker
Similar to road signs, the Speed Tracker needs to be located at the side of the road being monitored and
pointed towards oncoming traffic. In addition you should consider the following items when mounting the
Speed Tracker:
»
Tilt of the radar head
»
Mounting height and the detection range
»
Mounting angle
Radar Head Tilt
The radar head used in the Speed Tracker is mounted on a rotating bracket, allowing it to be tilted
downwards. By default it is tilted downwards 12°. This is the maximum allowable angle.
Mounting Height and Detection Range
The mounting height of the Speed Tracker is the height of the lower edge of the Speed Tracker above the
surface of the road. The mounting height you use will depend on the detection range you need. The
following table shows the correspondence between the detection range and the mounting heights, assuming
that the radar head is tilted to the maximum 12°.
Mounting
Height
Detection
Range
4 ft (1.22 m)
19 ft (5.8 m)
Speed Tracker Installation Guide
p. 9
