Introduction
...
Sections: select the section to configure.
User ID: numeric identification of the section.
Name: the section label.
Relay:
Distance (m): length of the section.
Colour: fill sections with colour.
Queue Density Modifier (%): this value determines the density required per section to be flagged as Queuedof the section.
Colour: fill sections with colour.
Queue Density Modifier (%): this value acts as a local (per section) multiplier of the queue density threshold value set as a global setting or as a per-carriageway setting. As such, a value of less than 100% means that the section will have a greater tendency to be flagged as queued, and a value of more than 100% means that the section will have a lesser tendency to be flagged as queued.
Selected Point
...
Index: the index of the selected point relative to other points on the carriageway (internal use only)
Point Type: the type of point you have selected:
a. Top Point (Cyan) - the top edge of the carriageway node.
b. Bottom Point (Green) - the opposite edge of the carriageway node.
c. Lane Line (Yellow) - each lane has a movable point with each node.
d. Section Point (Magenta) - the section point - each section has a single movable point.
e. Virtual Area Top Point (Red) - the top point of the outer virtual detection area.
f. Virtual Area Bottom Point (Red) - the opposite point of the outer virtual detection area.
X/Y: the co-ordinates of the selected point (carriageway node) on the X/Y axis of the PPI Display, with the radar as origin. The position cursor control can be used to move the selected carriageway nodal points.
Latitude/Longitude: the latitude/longitude reference of the selected point (carriageway node).
...
Show Section Labels: select this for labels to appear on this carriageway's sections (by default green and numerical).
Enable Queue Logic: select to enable queue recognition software for this carriageway. Once implemented, queues will be be flagged and display visually through an orange fill in the detection area.
Maximum Speed for Queue: the maximum traffic speed for a queue to be recognised in this carriageway. Anything faster will not be defined as a queue.
Heavy Traffic Threshold: the speed at which traffic is considered heavy on this carriageway.
Slow Track Density for Queue (/100m): how many tracks, travelling slower than the maximum queue speed, over one hundred metres, are necessary to considered a section in queue in this carriageway. This calculation of traffic density, as well the average speed of the traffic measured against the maximum queue speed, combine to recognise and alert queues.
Reset Count Down (s): the time necessary to pass, after the queue rule has been broken, without the queue rule being broken again for the queue alert to be lifted in this carriageway.
Enable Auto Queue: select this is you wish to implement Auto Queue for this carriageway. The software extrapolates on existing queue data to estimate potential or unrecognised queues.
Auto Queue Detection Window: how many of this carriageway's sections within every window the Auto Queue studies e.g. 4.
Auto Queue Section Count: how many of this carriageway's sections have to be in an existing queue in order for the Auto Queue to assume the entire window is in queue e.g. 2.
Sensor Allocation Mode:
a. Nearest: radar detect data from this carriageway's sections assigned to them by proximity (by default).
b. All in Range: detect data from all this carriageway's sections within their range, sometimes resulting in overlap and double-data.
Default Parameters: the parameters by which this carriageway will detect traffic. A sample selection of detection parameters, including a (default) Default configuration, is available. You are able to configure your own under Tracking Parameters. The default tracking parameters available are:
...
Default Debris Parameters: the parameters by which this carriageway will detect debris. A sample selection of detection parameters, including a (default) Debris configuration, is available. You are able to configure your own under Tracking Parameters. The default debris detection parameters available are:
...
Statistics Update Interval (s): the period of time between this carriageway's data updates, denoting how often an update occurs.
Statistics Storage Interval (s): the period of time between this carriageway's section data being transferred to the database, denoting how often a data transfer occurs. The data transferred is an aggregate of all the data collected within the time period of the Statistics Storage Interval.
Statistics Stale Timeout (s): the period of time in which no data is recorded from a particular section in this carriageway before it is ignored and not reported.
Statistics Minimum Seen (hits): the minimum number of times a vehicle must be seen before it is considered for section statistics. This provides a useful confidence level for each track, so that only longer lived tracks are counted and used to calculate average speeds.
Rule Update Interval (s): how often the radar checks for rules being broken in this carriageway.
Quiescence Timer (s): the period of time this carriageway must be detected and recorded as empty before it is officially reported as empty.
Carriageway Traffic Analysis
...
There are two Actions that can only be initiated by first selecting Edit, and then the required Action:
...
Auto Section: select to divide the carriageway into sections. See the Auto-Section page for further detail.
...