VISSIM 5.30-05 User Manual

13 VISSIM Programming Interfaces (API)
13.5 External Signal Control – SignalControl.DLLs
Users can also define external signal controllers using the signal controller
*.DLL and signal controller *GUI.DLL (in C or C++ programming language).
External signal control can be activated in the Signal Control dialog on the
tab page Controller (ext.), cf. section 6.7.
For the defined controllers, in each controller time step VISSIM contacts all
controller *.DLLs at the end of the current simulation time step. First, the
current signalization states and detector data of all SCs are passed to the
respective *.DLLs. Second, the *.DLLs are asked to calculate new desired
signal states which are subsequently passed back to VISSIM. Depending on
parameters set by the controller logic, either these signal states are applied
immediately, or transition states (e.g. amber when switching from green to
red) are inserted automatically, as defined in the signal group parameters in
VISSIM. In the next simulation time step the vehicles in VISSIM will cope
with the new signalization.
Documentation:
► \API\SIGNALCONTROL_DLLS\SIGNALCONTROL_DLL\SC_
DLL_INTERFACE.DOC
Examples:
► \API\SIGNALCONTROL_DLLS\EXAMPLES\
658 VISSIM 5.30-05 © PTV AG 2011