BlueTOAD Spectra Deployment
TrafficCast Quick Start—BlueTOAD Spectra and Spectra RSU
2-4 Revision 02 May 2019
Layout Guidelines
3. After you select the target road segment for speed/travel time data collection, use the guidelines that
follow to determine how many BlueTOAD detectors are necessary for your travel time study or
reporting objectives.
BlueTOAD has an effective omni-directional detection range of an approximately 300-foot
radius from the antenna.
The minimum recommended distance to space a BlueTOAD PoE or Cellular is every
0.25 mile.
Note: Power Control lets you reduce the detection zone to minimize overlap.
Thus, with Power Control, the minimum spacing could be less than 0.25 mile.
The maximum distance to space BlueTOAD PoE or Cellular is a function of the road type:
Road Type Maximum Spacing, miles
Highway 4 to 5
Arterial (no traffic lights) 2 to 2 ½
Arterial (with traffic lights) 1 to 1 ½
Dense urban area* 1
* Note: The number of intersections, traffic signals, or exit ramps can affect the speed/travel time;
thus, you should keep them to a minimum.
In an Origin/Destination (O/D) deployment, you must install BlueTOAD detectors before
the destination as well as after. The number of additional BlueTOAD detectors necessary is
then based on driver options.
Example: If a driver could turn either left or right at T intersection, you must install
a BlueTOAD in each of the two possible directions of travel.
Pre-Installation Testing
The steps that follow give instructions to test BlueTOAD Spectra detectors before they are installed in the
field:
To test a Spectra Ethernet PoE or a Spectra Ethernet Cellular PoE, go to Step 4.
To test a Spectra Solar Cellular, go to Step 5.
4. To test a Spectra PoE detector:
a. Connect the Ethernet cable to power ON the detector.
b. In the presence of Bluetooth signals, open the enclosure and confirm that the LEDs on the
PCB
3
are operating correctly.
c. Go to Step 6.
3
The PCB with its LEDs is the same in all three types of BlueTOAD Spectra detectors. Correct operation of the LEDs is shown
in the photograph and table on Page 2-5.
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