1. Make sure the Signal time-space diagram window is open (Opening a signal time-space diagram).
2. Select the settings you need in the upper window pane.
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Element |
Description |
|
Path (initial direction) |
Use this button to select a different path as initial direction (Opening a signal time-space diagram). Note You cannot always select all available PrT paths, as certain criteria must be met for selection. |
|
Path (reverse direction) |
Use this button to select a different path as reverse direction (Opening a signal time-space diagram). |
|
Parameters |
Use the Edit button to change the basic settings of the signal time-space diagram ( Defining demand segment filters and travel times for the signal time-space diagram). |
|
Max. signal time |
Define the period of time that you want to display on the time axis of the signal time-space diagram. Note By default Visum determines the time period as follows: It calculates the least common denominator of all cycle times displayed in the diagram and multiplies this value with two. |
|
Signal time-space diagram mode |
Flowing off Based on the green time of the displayed turn at a signal control, a green band indicates the possible range in which vehicles with the defined travel time can travel to the next signal control. Arterial bands The green band is displayed only for the range in which a vehicle with the defined travel times reaches all signal controls on its way at green (progressive signal system). Therefore it is a subset of the green bands visualized with the Flowing off option. If this constellation does not exist, no green band is displayed. |
The settings are applied.
Defining demand segment filters and travel times for the signal time-space diagram
1. Make sure the Signal time-space diagram window is open (Opening a signal time-space diagram).
2. In the upper window area next to Parameters, click Edit.
The General procedure settings window opens. In the navigator PrT settings > Signal offset optimization is selected.
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Note: These and other parameters are also relevant for signal offset optimization (Signal offset optimization). |
3. Make the desired changes.
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Element |
Description |
|
Use demand segment filter |
If this check box is selected, the signal time-space diagram only displays those signal times which are valid for the selected demand segments. Click the unnamed button to select the demand segments you need. The signal timing of the signal group with the longest red phase is used if the following conditions apply: Several demand segments have been selected or this filter is not used and the signal timing of the demand segments is not identical. Note A turn can have several lanes which may be allocated to different signal groups. The lane turns and allocated signal groups may refer to different traffic systems. In this mode each demand segment is allocated to exactly one transport system. Therefore, with the selection of the demand segment the signal group is selected as well. |
|
Travel times |
Here you specify the travel times for the following network objects: links, turns, and main turns. You use the button to select an attribute for each network type. This attribute can be multiplied by a factor. The travel time between two signal controls in the signal time-space diagram is the sum of the travel times needed for traversing the network objects. Travel times of links and nodes within main nodes are not considered because they are contained in the main turns. |
4. Confirm with OK.
The changes are applied.
