Pre-Installation Considerations: RTMS Echo Sensor

Sunken Road and Roadside Walls

When vertical surfaces reflecting microwaves (e.g., dense chain link fences or retaining walls of a sunken roadway) are present, multi-path reflections from large vehicles in close lanes cause additional false (ghost) detection in farther detection zones. To avoid this problem, install the RTMS Echo high and increase the elevation angle to detect the far lanes of traffic exluding the nearest lanes, as shown on the right in the figure below.

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