Installing Rtms Echo On Sign Structures - Image Sensing Systems RTMS Echo User Manual

Chapter 2:

Installing RTMS Echo on Sign Structures

RTMS Echo User Guide
The installation of the RTMS Echo on Message Sign structures is acceptable
only if the RTMS Echo is mounted to be offset from the overhead span of the
structure. Structures can reflect the microwave signal and distort the accuracy
of detection. Some structures such as DMS units have very wide, flat metal
bottoms to the structure that are similar in nature to bridges, these type can
cause more interference than other lattice work type structures and may
require consultation with RTMS Echo Technical Support.
The best way to mount the RTMS Echo is to place a horizontal mast arm or
pipe approximately 1.3 m (4 ft) away from the structure (1.8-2.4 m [6-8 ft] if
DMS), ideally on the back of the structure away from any lighting or signs.
Ensure the detector is aimed perpendicular to the traffic flow.
Figure 2-14: RTMS Echo on Sign Structures
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Pre-Installation Considerations
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