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e. Do not increase sensitivity to compensate for improper alignment
f. Click OK when finished
V. If vehicles are inaccurately detected as a result of large trucks (splashing), click FINETUNE
a. If first and last zones are well defined, the Auto fine tuning can be used
b. For manual fine tuning, set the initial value to 0, then use the up and down arrows to
visually verify that a decrease in splashing effect is taking place
¾ A splash occurring nearer to the sensor is corrected by increasing the fine tune value
¾ A splash occurring farther from the sensor is corrected by decreasing the fine tune
value
c. Click OK
VI. Click PERIOD to set the length of data collection interval, in seconds
a. Use up and down arrows to adjust the message period (interval) length
b. Click OK
VII. Verify the accuracy of the vehicle detection
a. Select PERIOD and set to 30 seconds
b. Select VERIFY from the main screen
c. When the left-side window appears, tap the spacebar to checkmark the CLEAR TOTAL
COUNTERS ON NEXT MESSAGE INTERVAL box and get ready to start counting
d. At the end of the current message period, the background window blinks and the
program emits a beep, signaling to start the manual count
e. Count vehicles in the selected lanes as they cross the RTMS beam
f. At the end of the message period the RTMS updates the detected vehicle counts for that
period
g. Tap the space bar and this will checkmark the STOP COUNTING box and freeze the
RTMS count
¾ Enter the manual count to display the absolute difference and the percent deviation
between the manual and RTMS counts
¾ Deviation beyond approximately ±5% may require fine tuning or sensitivity correction
h. Click SAVE to save results of verification as a text file
i. Click OK
VIII. Click SPEED CALIB to calibrate the vehicle speeds
a. Click automatic speed calibration
b. Input reference speed for all lanes
¾ Reference speed for each lane is the average speed and should be determined
using radar speed detection
¾ Insert an X to exclude a lane from calibration
c. Enter the number of calibration cycles when OFF is highlighted by using the up and
down arrows. CALIBRATION IN PROCESS will flash
Hint: It is better to reduce the period to 30 seconds so there are more cycles. 7
cycles of 30 seconds is recommended.
d. The setup utility adjusts all active zone coefficients to converge the reference speeds
e. If traffic flow changes during calibration , adjust the reference speeds as appropriate
f. When finished, set the number of calibration cycles to OFF
g. Click QUIT
IX. Click the SENSOR ID to specify a sensor ID number
X. Click DATA MODE to specify data parameters
a. Select MESSAGE COMPOSITION to open the RTMS Statistical message window
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