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Re: [sumo-user] the simaple question
  • From: Michael Behrisch <oss@xxxxxxxxxxx>
  • Date: Fri, 21 Jun 2019 14:13:32 +0200
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Hi,
1. The traffic light commands work regardless of an E2 detector.
2. Your sketch is hardly readable but your textual description sounds
correct.

Best regards,
Michael

PS: Please do not double post.

Am 19.06.19 um 16:55 schrieb Jane Cheung:
> 1. Does it means that I  must define the E2 in additional files and 
> built it in the .sumocfg file? If I*DO NOT* define the E2 file, the
> TRACI commands
> ********************************************************
> raci.trafficlight.getRedYellowGreenState
> traci.trafficlight.getControlledLinks
> ********************************************************  
>  could *NOT* be called by TRACI.
> 
> 
> 2. It means it has just finished the movement in the last stepLength,
> and the next step movement has not been implemented? like the time *t2** *?
> ------------- t1---------------*t2*-----------------t3---------------
> ________  __________  ___________ ________
> 
> ------------- <StepLength>< StepLength>-------------
> 
> Thanks !
> 
> 
> On Wed, Jun 19, 2019 at 6:45 AM Jakob Erdmann <namdre.sumo@xxxxxxxxx
> <mailto:namdre.sumo@xxxxxxxxx>> wrote:
> 
>     1 & 2: you can piece this together from calls to
> 
>     traci.trafficlight.getRedYellowGreenState
>     traci.trafficlight.getControlledLinks
> 
>     traci calls are handled before vehicles start to move in the current
>     step. This means the returned state (vehicle positions etc will be
>     from the previous step (t - stepLength).
> 
>     Am Mi., 19. Juni 2019 um 03:37 Uhr schrieb Jane Cheung
>     <cheung180515@xxxxxxxxx <mailto:cheung180515@xxxxxxxxx>>:
> 
>         As I understand, I could
>         use HaltingNumber=traci.lanearea.getLastStepHaltingNumber( detID )
>         to get the vehicle halting number when the traffic light that
>         controlled lane with E2 detector(detID) is red.
>         The "halting" is the meaning of  "stopped.
>          Is that right?  
> 
>         Other questions, 1) During the simulation, if the simulation
>         time  T is known, how could I know which lanes controlled by
>         different traffic lights is red phase? 
>                                    2) During the simulation, if the
>         land is known, how could I know the time of red phase for one
>         specified  lane if  I use the adaptive traffic control model?  
> 
> 
>         Additionally, there are some  simple questions that I hope could
>         get your help:
>         What is the meaning of the "Last Step"? Does it means that if
>         the time that the TRACI is called is "t", the last step is
>         "t-1"(if each step is 1 second)?
> 
> 
>         Thanks for your help and patience!
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