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To manually create a new rule without using the wizard:1.
In the Configure Rules window, select New.
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Select Rule Type:
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Speed Rule: Section speed rule - looks for one or more vehicles moving slowly in a section.
Queue Rule: Queue rule - alarms when a section has gone into queue.
Classification Rule: Section classification rule - looks for one or more vehicles with the specified classification, can include other filters such as speed etc.
Reversing Rule: Section speed rule but designed specifically to look for vehicles going in the wrong direction at a specified speed.
Track Speed Rule: Track speed rules are used to analyse each track in turn. Like all other rules, this will raise an alarm for a section, but the rule will look at each track individually to identify if it has broken the rule.
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Select Create Rule. The new rule is now configurable as above.
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| Info |
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Speed, Queue, Classification and Reversing Rules are Section Rules. This means that, by default, each section is examined at regular intervals for evidence of of one or more tracks breaking the rule. A Track Speed Rule is a Track Rule. This means that each track is individually examined as to whether it is breaking the rule. Speed Rules and Track Speed Rules are different. A Speed Rule checks multiple tracks in each section over time against speed parameters; i.e. looking for common behaviour in traffic, whereas a Track Speed Rule checks individual tracks against speed parameters. For an individual track to trigger an alarm we must be satisfied that the track is real and the rule is definitely broken, so a high break count is set. Therefore, a Track Speed Rule is more suited to a Stopped Vehicle Rule where we are looking at the behaviour of individual tracks. |
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Rules can easily be tested to ensure that the correct alarms is triggered when a rule is broken. In the Configure Rules window, you can generate a test alarm from any of the existing rules.1.
Select the rule you wish to test. Then, select Test.
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The Rule Test window will appear. Choose the Section and Lane you wish the alarm to be tested in, then select OK.
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To run a test against all sections within the associated carriageway, select the All Sections option. The section option will be replaced with a delay setting. This option will automatically generate an alarm for each section in turn with a pause of the specified delay time between each alarm. By default the delay is 1 second.
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Select OK when you are ready to start each section.
The alarm notifications will be visible (and if enabled, audible) and the relevant section will change colour to reflect the alarm severity, assuming this option was selected in the rule configuration.
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