Showing data from links in lists

Using the Link evaluation, you can record the result attributes of vehicles based on segments or lanes of links and connectors for the defined time interval. You can restrict the evaluation to vehicle classes and individual vehicles. The following must be defined in the network:

Reversing vehicles are not recorded. Vehicles pulling forward out of a parking lot are not recorded as long as they drive on the connector that connects the parking lot with the link on which they will continue their route.

Note: Ensure that the attribute Link evaluation of links and connectors - which you want to evaluate - is selected (Attributes of links).

If you assign links a color based on aggregated parameters, for the Links evaluation, select Collect data (Assigning a color to links based on aggregated parameters).

By default, the data for all vehicle classes is entered together. You can also show the data for certain vehicle classes separately in the evaluation (Configuring evaluations of the result attributes for lists).

If you calculate and display emissions based on emission classes, an Internet connection is required to transfer the data at the end of the simulation run (Calculate accurate emissions with Bosch Cloud Service).

You can save the following data and data formats:

Output

ASCII file

MDB table

Attribute file from attribute list

Aggregated data

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Raw data

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1.  From the Evaluation menu, choose > Configuration > Result Attributes tab.

2.  In the Links row, select the option Collect data.

3.  If desired, change the time and/or the interval (Configuring evaluations of the result attributes for lists).

4.  Click the More button.

The Links window opens.

5.  Make the desired changes:

Element Description
Collect link results
  • per link segment: the data is entered in the segments for all lanes
  • per lane segment: the data is entered in the segments for each lane

6.  Confirm with OK.

7.  Start the simulation (Running a simulation).

Result of evaluation of links
  • ►  On the Evaluation menu, click > Result lists > Link evaluation results.

A link evaluation contains the following data:

Attribute

Definition

Volume

Volume [veh/h]

For mesoscopic simulation for link segments outside the sections which are simulated microscopically, the following applies:

Volume = total distance / (segment length * time interval length)
(Unit: veh/h),

Segment length: value of the Segment length link attribute

Density

Vehicle density

For mesoscopic simulation for link segments outside the sections which are simulated microscopically, the following applies:

Density = total travel time / (segment length * time interval length)

Speed

Average speed

For mesoscopic simulation for link segments outside the sections which are simulated microscopically, the following applies:

(Average) speed = total distance / total travel time

Emissions

For add-on module API package only: Results of emission calculation for selected file EmissionModel.dll (Accessing EmissionModel.dll for the calculation of emissions).

For add-on module Bosch: Results of the Bosch emission calculation (Calculate accurate emissions with Bosch Cloud Service)

Emission values can also be displayed in:

SimRun

Simulation run: Number of simulation run

LinkEvalSegs

Link evaluation segment: Number of link evaluation segment

DelayRel

Delay (relative): Total delay divided by total travel time of all vehicles in this link segment during this time interval

For mesoscopic simulation for link segments outside the sections which are simulated microscopically, the following applies:

Relative lost time = total delay / total travel time

TimeInt

Time Interval: Duration of the evaluation intervals during which the data is aggregated

You can also show the following attributes of the Cartesian world coordinates in the list as indirect attributes of link evaluation segments:

Attribute

Definition

StartCoord

Start coordinates: coordinates (x), (y), (z) at which the link evaluation segment begins

StartCoordX

Start coordinate (x): x value of the start coordinate

StartCoordY

Start coordinate (y): y value of the start coordinate

StartCoordZ

Start coordinate (z): z value of the start coordinate

EndCoord

End coordinates: coordinates (x), (y), (z) at which the link evaluation segment ends

EndCoordX

End coordinate (x): x value of the end coordinate

EndCoordY

End coordinate (y): y value of the end coordinate

EndCoordZ

End coordinate (z): z value of the end coordinate

Link

Number of the link on which the link evaluation segment is located

StartPos

Start position: Position in meters at which the link evaluation segment on the link begins

EndPos

End position: Position in meters at which the link evaluation segment on the link ends
Calculation of the link evaluation results for the mesoscopic simulation

The following values are recorded for each meso edge aggregated over all vehicles within a time interval:

  • Total path length
  • Total travel time
  • Total delay: the delay is defined as the actual travel time on the meso edge minus the travel time if the vehicle had been traveling constantly at desired speed.

Recorded values for meso edges with a length of zero are assigned only to the link segment located at the position of the meso edge on the link.

Measurement data from origin connectors and PT line connectors are ignored, since vehicles on these edges are not yet counted as “inserted into the network”. The delay on these edges is counted as Delay (latent), which is not recorded by link evaluations. Delay (latent) for origin connectors = zone connectors / abstract parking lots is displayed in the Parking Lots evaluation (Displaying parking lot results in lists).

Superordinate topic:

Configuring evaluations of the result attributes for lists