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The Traffic Detector module is able to detect the emergence of traffic jams on the road. The module generates a specific event and, in certain cases, notifies the operator.

To set up the jam detection parameters, do the following:

1. Open the Hardware tab in the System Settings window (1).
2. In the object tree on the left side of the Hardware tab, select the Traffic Detector object representing the Traffic Detector module to be set up. The settings panel of the selected object will open on the right side of the window Go to the Traffic Detector object settings panel (2).
   
3. In the Beginning time field, s field (3), enter for how long (in seconds) the jam conditions must be satisfied for the start of the jam to be detected (3).
4. In the Ending time, s field, enter for how long (in seconds) the reverse jam conditions must be satisfied for the end of the jam to be detected.
5. In the Average speed threshold field, km/h field (4), enter the minimum average traffic speed which is still not considered to be a jam. When :
   • If the average traffic speed
   remains
   • is lower than this value
   for a certain period of time
   • , then a traffic jam may be detected (if other conditions are satisfied)
   (4)
   • .
   The threshold is set in km/h.
   • If the average traffic speed is higher than this value, then a traffic jam may be considered to have ended (if other conditions are satisfied)

6. In the Traffic jam threshold field, % field (5), enter the maximum road load (in percent) which is still not considered to be a jam. When :

   • If the road load

   remains

   • is higher than this value

   for a certain period of time

   • , then a traffic jam may be detected (if other conditions are satisfied).

   • If the

   overall

   • road load is lower than

   that specified, no traffic jam is detected

   • this value, then a traffic jam may be considered to have ended (if other conditions are satisfied).

     Info
     title Note.
     The road load parameter is calculated using the following formula: Image Modified  ,

   where T₀

   • where Image Added is the

   total of the time periods when

   • time during which the vehicles were

   present

   • in the

   loop detector zone, and T is the time period set in the Statistics update time field

   • coverage area of the Traffic Detector software module for the statistics update period, and Image Added is the total operating time of the Traffic Detector software module for the statistics update period (see Setting up the statistics update period).

     
     

7. Click Apply (6).

The jam start detection parameters are now set.