Count Locations layer

The Count Locations layer displays all static sensors of the network that are stored in the system.

The sensors can provide measurements of different parameters according to the nature of the sensor.

A typical measurement is the volume of the traffic flow.

Click a sensor icon to open a pop-up window containing the list of the attributes of a sensor.

In listed attributes set, you can set the check-box:

Attribute Description

Enable for forecast

You can set:

  • YES: count location data are accounted for the Short Term Forecast (STF) engine. The count location icon is enriched by a number in the range [0, 100] to show the reliability value.

    For example:

  • NO: count location data are ignored by STF.

The set value affects the forecast every time that Traffic Real-time Equilibrium (TRE) reloads it for understanding if it should use the location data or not.

Therefore, the effect of this set can be delayed for a time period defined as:

[Tchange, Tload]

With:

Tchange: time of the option set value.

Tload: time when TRE reloads the option set value.

According to the zoom level, a single icon can group two or more "real" sensors.

In this case, before showing the list of attributes, a pop-up window opens to select the specific sensor from the list associated with the icon.

Tip:  You can get the same result through the operation (→ Showing a selected item).

Info type Description

The sensor is online and it can provide a measurement from the field.

The sensor is in warning state. The meaning of this state can vary according to the type of sensor.

The sensor is offline and it cannot provide a measurement from the field.

The sensor is not receiving any information.

The sensor is disabled and it is not providing any measurement.
Option type Description

Theme

Allows you to choose a set of graphic themes to represent the layer entities. The selectable options are:

  • Color associated with the count location status: see the LAYER INFO table.
  • Color and value associated with the count location reliability: the reliability is a number in the range [0, 100] and measures the quality of data provided by a count location.

Enable for forecast

You can set a filter to show:

  • YES: count locations accounted by the Short Term Forecast (STF) engine.
  • NO: count locations ignored by STF.

On the map, only the locations that are matching the exact set of enabling options are shown (four possible combinations of YES/NO values).

Chart button Description
Flow

Displays the traffic flow dimension.
Speed

Displays the vehicle speed along a specific link or street of the traffic network.
  1. Select the layer in the ACTIVE LAYERS list.
  2. Click the List icon.

A pop-up window with a list of items opens. Every item represents a count location, which is characterized by a set of attributes.

Other operations are available for the layer (→ Operations on layers).