Data model for signal cycle and split optimization
Network object type |
Attribute |
Description |
Signal controllers and subordinated objects |
|
Signal times and stage distribution in the initial state |
Signal controller |
Reference to signal coordination groups |
At cycle time optimization with procedure parameter Use cycle times of coordination groups = true, only one member of the cycle time family of the coordination group is selected as a new cycle time. |
Signal coordination group |
Cycle time family |
|
Signal controller |
ICA maximum cycle time for optimization ICA minimum cycle time for optimization |
At cycle time optimization with procedure parameter Use cycle times of coordination groups = false, the new cycle time is selected from the interval between these two attributes. |
Signal controller |
Optimization method |
None (signal time optimization for the signal controller at this node) Green time Cycle time and green time |
Signal controller |
Turned off |
If the signal controller has been turned off, no signal time optimization will be calculated for the node (main node). This attribute is calculated and derived from the value for the signal program number attribute. A signal controller is considered to be switched off if the signal program number is 0 (Vissig type) or 99 (RBC type), or if an invalid signal program number is set. |
Turn |
The attribute for the design hourly volume set in the procedure parameters |
Turn volumes Specify this value as an hourly volume. |
Node model and subordinate objects |
All geometry attributes |
Lane allocation at node |
Optimization is controlled by the following procedure parameters (components of the procedure parameters for intersection capacity analysis):
Procedure parameter |
Data type (Standard) |
Description |
UseCycleTimeFamily |
Bool (True) |
At cycle time optimization with procedure parameter UseCycleTimeFamily=True, only one member of the cycle time family of the coordination group (if available) is selected as a new cycle time. |
Precision of computation |
Full seconds or tenths of seconds |
Use this parameter to specify whether full seconds or tenths of a second are permitted as green time start and end (RBC only). With Vissig controls, this is determined by the switching frequency of the signal controller. |