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Re: [sumo-user] VariableSpeedSigns in TraCI
setParameter/getParameter won't do anything here.
Also, for a VSS you still have to list all affected lanes. There is no automatic detection of downstream lanes. It really just calls lane.setMaxSpeed internally.
Totally agree on the fun of having visual feedback though (-:

Am So., 2. Juli 2023 um 22:57 Uhr schrieb Sasan Amini <aminissn@xxxxxxxxx>:
To be sure, using the generic functions getParameter() or
setParameter() won't work in this particular case? or am I using them
wrong?

On Sun, Jul 2, 2023 at 10:49 PM Sasan Amini <aminissn@xxxxxxxxx> wrote:
>
> That seems to be a bit more complicated than I thought.
> Regarding the workaround, I guess using VSS is more practical because
> it affects all the downstream lanes (overwrites the vehicle maxSpeed)
> while using traci.lane.setMaxSpeed would only change the speed limit
> in the lane where the vss is defined. Moreover, it takes the fun away
> from the SUMO-GUI by not changing the VSS icons.
>
> On Sun, Jul 2, 2023 at 10:38 PM Jakob Erdmann <namdre.sumo@xxxxxxxxx> wrote:
> >
> > Adding a new traci function requires touching multiple parts of the code. As an example, see https://github.com/eclipse/sumo/issues/12568
> > However, you can achieve the effect of a VSS by calling traci.lane.setMaxSpeed
> >
> > Am Fr., 30. Juni 2023 um 22:20 Uhr schrieb Sasan Amini <aminissn@xxxxxxxxx>:
> >>
> >> Dear all,
> >> I am trying to implement dynamic traffic control on a freeway using
> >> variable speed signs. I noticed that the TraCI functions are missing
> >> for vss so I tried to use the get or set parameter function, which
> >> didn't work out. I also tried to create the traci functions myself as
> >> follows, but they also have no effect. What is the right way to add
> >> such functions to traci?
> >>
> >> Thanks,
> >> Sasan
> >>
> >> def getSpeed(self,vssID):
> >> return self._getUniversal(tc.CMD_GET_VARIABLESPEEDSIGN_VARIABLE,'speed',vssID)
> >> """getSpeed(string)
> >>
> >> gets the speed in m/s for the named variable speed sign within the last step.
> >> """
> >> def setSpeed(self, vssID, speed):
> >> """setSpeed(string, double)
> >>
> >> sets the speed in m/s for the named variable speed sign.
> >> """
> >> self._setCmd(tc.CMD_SET_VARIABLESPEEDSIGN_VARIABLE,'speed',vssID,speed)
> >> _______________________________________________
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> >
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