Re: [sumo-user] Beginner for SUMO

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Re: [sumo-user] Beginner for SUMO

From: Ei Ei Mon <eieimonimceits@xxxxxxxxx>
Date: Sat, 8 Sep 2018 12:01:47 +0700
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Dear,

I would like to ask again. In my case, I want to stop the vehicle by using the following statement:

traci.vehicle.setStop('43.0',edgeID='L10189',laneIndex=1,pos=90,duration=600,flags=0,startPos=50);

but in this case, duration attribute is not working. Could you give me some suggestions?

Thank you in advance.

with best regards,

On Sat, Sep 8, 2018 at 10:50 AM Ei Ei Mon <eieimonimceits@xxxxxxxxx> wrote:

Dear,

In my case, I want queue length of each edge. For this case, now I compute the average value from queue length of each lane by using lane area detector. Is it possible by using this way? Or are there any other methods to get queue length directly from each edge?

with best regards,

On Tue, Sep 4, 2018 at 7:38 AM Ei Ei Mon <eieimonimceits@xxxxxxxxx> wrote:
Noted with thanks. I will try it.

On Mon, 3 Sep 2561 at 23:04 Jakob Erdmann <namdre.sumo@xxxxxxxxx> wrote:
Every edge is uni-directional, you can retrieve lane shapes (traci.lane.getShape) to obtain orientations
Capacity of edges is a function of speed limit and lane count. (traci.lane.getMaxSpeed(), traci.edge.getNumLanes()). getNumLanes is not yet available in 0.32.0
Fan out can be retrieved via lane.getLinks() but Fan-in cannot be retrieved directly.
For analyzing network properties, the python library sumolib is much better suited than traci: http://sumo.dlr.de/wiki/Tools/Sumolib

regards,
Jakob

2018-09-03 17:51 GMT+02:00 Ei Ei Mon <eieimonimceits@xxxxxxxxx>:
Thank you.

On Mon, 3 Sep 2561 at 22:00 Jakob Erdmann <namdre.sumo@xxxxxxxxx> wrote:
see http://sumo.dlr.de/wiki/Simulation/Output/Lane-_or_Edge-based_Traffic_Measures

2018-09-03 7:05 GMT+02:00 Ei Ei Mon <eieimonimceits@xxxxxxxxx>:
Dear,

Can we know the traffic flow of each link in the road network without using any detectors? Could you give me some suggestions?

with best regards,

On Sun, Aug 26, 2018 at 4:29 PM Jakob Erdmann <namdre.sumo@xxxxxxxxx> wrote:
yes. You can use getJamLengthMeters.

2018-08-25 12:38 GMT+02:00 Ei Ei Mon <eieimonimceits@xxxxxxxxx>:
Dear,

In my case, I want to get the queue length of the whole edge by using lane area detectors on each lane. Can I use the getJamLengthMeters?
Could you give me some suggestions.

Thank you.

On Mon, Aug 20, 2018 at 9:26 PM Jakob Erdmann <namdre.sumo@xxxxxxxxx> wrote:
Hello,
getLastStepVehicleNumber(id) returns the number of vehicles that were on the detector in the previous simulation step.
nVehEntered holds the number of vehicles that entered the detector in the configured aggregation interval.
The values diverge if
- the aggregation interval differs from 1s
- vehicles enter and leave the detector in the same simulation step.

regards,
Jakob

2018-08-20 12:20 GMT+02:00 Ei Ei Mon <eieimonimceits@xxxxxxxxx>:
Dear,

In my case, I want to get the number of vehicles. In that case, may I know for some results of traci.lanearea.getLastStepVehicleNumber(id) and   nVehEntered from ouput file of detector. These results are same or not? Can I use nVehEntered instead of traci method as offline mode.

Thank you in advance.

with best regards,

On Sun, Aug 19, 2018 at 4:53 AM, Ei Ei Mon <eieimonimceits@xxxxxxxxx> wrote:
Thank you. I will try it.

On Sun, 19 Aug 2561 at 02:31 Jakob Erdmann <namdre.sumo@xxxxxxxxx> wrote:
traci.simulation.convert2D(edgeID, offset, laneIndex, toGeo).

offset = 0 gives you the start of the lane
toGeo = true gives lon, lat (otherwise network coordinates x, y are returned).

2018-08-18 18:11 GMT+02:00 Ei Ei Mon <eieimonimceits@xxxxxxxxx>:
Dear,

In my case, I want to get the startPos of edge or lane. I cannot find the traci methods to get startPos of edge or lane. Could you give me some suggestions?
Thank you in advance.

with best regards,

On Sat, Aug 18, 2018 at 5:27 PM, Ei Ei Mon <eieimonimceits@xxxxxxxxx> wrote:
oh, I see. Thank you. I will try it.

On Sat, Aug 18, 2018 at 5:10 PM, Jakob Erdmann <namdre.sumo@xxxxxxxxx> wrote:
You can let multiple detectors write to the same file. Their outputs are still distinguishable by the detector id in the data elements.

2018-08-18 11:46 GMT+02:00 Ei Ei Mon <eieimonimceits@xxxxxxxxx>:
Dear ,

In my simulation, it has to write too many output files of e2 detectors . Now, I got the following error:

Error: Could not build output file 'output/e2Detector_L10256_1_6.txt' (Too many open files).
Loading of additional-files failed.
Quitting (on error).

How should I fix it?

On Sat, Aug 18, 2018 at 12:38 PM, Ei Ei Mon <eieimonimceits@xxxxxxxxx> wrote:
thanks for your time. I will try it again.

On Fri, Aug 17, 2018 at 8:18 PM, Jakob Erdmann <namdre.sumo@xxxxxxxxx> wrote:
the value of SUMO_HOME cannot be a list of directories as it is in your case.
Make sure it points to the directory that contains the 'tools' folder.
Explanation: the traci script looks for traci in $SUMO_HOME/tools

2018-08-17 11:28 GMT+02:00 Ei Ei Mon <eieimonimceits@xxxxxxxxx>:
Dear,

Now I got the unexpected error: No module named traci.

I set up the sumo path as the following:

PATH=$PATH:$HOME/ .local/bin:$HOME/bin
export SUMO_HOME=/usr/lib/sumo:/usr/share/sumo
export PATH=/usr/sbin:$PATH
export PATH=$SUMO_HOME/bin:$PATH:$SUMO_HOME/tools:$PATH
export PATH

I changed sumo version a few days ago. How can I fix it?

On Tue, Aug 14, 2018 at 3:48 PM, Ei Ei Mon <eieimonimceits@xxxxxxxxx> wrote:
yes, thank you.

On Tue, Aug 14, 2018 at 3:03 PM, Jakob Erdmann <namdre.sumo@xxxxxxxxx> wrote:
Your traci script is still using an old version of SUMO. Please update the value of SUMO_HOME to point to the new version.

2018-08-10 12:58 GMT+02:00 Ei Ei Mon <eieimonimceits@xxxxxxxxx>:
Dear,

According to your suggestion, I used the latest development version of SUMO.Currently, I got the following error.

traci.exceptions.TraCIException: Get Edge Variable: unsupported variable 0x52 specified

Could you give some suggestions? Thank you.

On Thu, Aug 9, 2018 at 9:13 PM, Ei Ei Mon <eieimonimceits@xxxxxxxxx> wrote:
Yes. Thank you.

On Thu, 9 Aug 2561 at 20:45 Jakob Erdmann <namdre.sumo@xxxxxxxxx> wrote:
This function is only available in the latest development version. You can get it here: http://sumo.dlr.de/wiki/Downloads#SUMO_-_Latest_Development_Version
regards,
Jakob

2018-08-09 14:05 GMT+02:00 Ei Ei Mon <eieimonimceits@xxxxxxxxx>:
Dear,

When I use traci.edge.getLaneNumber(edgeID), I got the following error.

AttributeError: EdgeDomain instance has no attribute 'getLaneNumber'

How can I fix it? Thank you in advance.

On Fri, Aug 3, 2018 at 2:01 PM, Ei Ei Mon <eieimonimceits@xxxxxxxxx> wrote:
Thank you very much.

On Fri, Aug 3, 2018 at 1:51 PM, Jakob Erdmann <namdre.sumo@xxxxxxxxx> wrote:
Hello,
I've run my own test and looked at the code again:
The way sumo is currently implemented you will never see a duplicate ID.
This is because the detectors in SUMO effectivly detect only the center line of a vehicle rather than its whole width.
Even during a continuous lane change, the vehicle's center line is always just on one lane or the other.
Other vehicles coming from behind will perceive the whole width but detectors do not.

regards,
Jakob

2018-08-03 7:00 GMT+02:00 Ei Ei Mon <eieimonimceits@xxxxxxxxx>:
Dear,

May I ask again for my problem. Now I use --step-length and --lanechange.duration together. By using --lanechange.duration option, I think I can get duplicate vehicle ids that use lane changing on two neighboring lanes. Is it making sense? Now I didn't get any duplicate ids. It should be or not?

Thank you very much.

with best regards,

On Thu, Aug 2, 2018 at 2:43 PM, Ei Ei Mon <eieimonimceits@xxxxxxxxx> wrote:
Thank you. I will check with sublane model. In my case, I would like to detect the duplicate vehicle ids from lane area detectors at the same time step. According to your suggestions, I think I can detect the ids from detectors on two neighboring lanes. I will try it.

On Thu, Aug 2, 2018 at 1:47 AM, Jakob Erdmann <namdre.sumo@xxxxxxxxx> wrote:
Step-length does not make a difference in the default model because lane-changes are instantaneous regardless of the step-length. This means you will never see the vehicle on two neighboring detectors in the same time step.
To get continuous lane changes you can enable another model: http://sumo.dlr.de/wiki/Simulation/SublaneModel
Do you need the double detection directly for your project or are they a means to accomplish something else? In that case there may be other ways to accomplish your objective.

2018-08-01 13:15 GMT+02:00 Ei Ei Mon <eieimonimceits@xxxxxxxxx>:
Thank you, dear.

I checked with different values for --step-length like 0.1, 0.01, 0.001. But I don't get duplicate ids. I think that we can get duplicate vehicle ids because some vehicles changed lanes in gui what I saw.
How should I check it? Thank you in advance.

On Tue, Jul 31, 2018 at 9:47 PM, Jakob Erdmann <namdre.sumo@xxxxxxxxx> wrote:
When a vehicle changes lanes it is only registered on the new lane in that time step. To register lane changes using lanearea detectors you need to monitor multiple steps.

2018-07-31 15:18 GMT+02:00 Ei Ei Mon <eieimonimceits@xxxxxxxxx>:
Thank you for your reply.

In my case, when I check simulation gui I saw some vehicles change their lanes. But for that case, when I use traci.lanearea.getLastStepVehicleIDs(), I got no duplicate vehicle ids from all lanes.
How should I check?

Thank you.

On Tue, 31 Jul 2561 at 17:21 Jakob Erdmann <namdre.sumo@xxxxxxxxx> wrote:
1) use sumo option --step-length SECONDS
2) what kind of duplication are you interested in? Please explain with an example.

2018-07-31 11:30 GMT+02:00 Ei Ei Mon <eieimonimceits@xxxxxxxxx>:
Thank you, dear.

Now, I would like to know how to change the simulation time step in SUMO.

In my case, I set up lane area (e2) and MeMe (e3) detectors in the same area. For that case, I set up lane area detectors on all lanes to cover for all lanes. In this case, I would like to check the duplicate vehicle ids from tracking the lane area detectors. Could you give any suggestions?

Thank you in advance.

with best regards,

On Fri, Jul 27, 2018 at 7:11 PM, Jakob Erdmann <namdre.sumo@xxxxxxxxx> wrote:
Hello,
SUMO automatically tracks accidents. See http://sumo.dlr.de/wiki/Simulation/Safety#Collisions
In the latest development verion of SUMO (http://sumo.dlr.de/wiki/Downloads#SUMO_-_Latest_Development_Version) You can retrieve accident information by calling traci.simulation.getCollidingVehiclesIDList (http://sumo.dlr.de/wiki/ChangeLog#Enhancements).

regards,
Jakob

2018-07-23 14:15 GMT+02:00 Ei Ei Mon <eieimonimceits@xxxxxxxxx>:
Dear,

I would like to get some suggestions. In my case, I would like to detect the car accident case on the lane by using lane area detectors. Which methods are the most suitable for that by using traci? Could you give me some suggestions.
Thank you in advance.

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