Re: [sumo-user] collision avoidance mode in ACC

[Jakob Erdmann]

Yes.
However, it's still unsafe under some parameter settings (i.e. step-length
1s).

Am Mo., 24. Jan. 2022 um 23:20 Uhr schrieb Royal Bhandari <
royalbhanda...@gmail.com>:

> Hello,
>
> Is the Collision avoidance mode developed by TransAID implemented in the
> default ACC model?
>
> Regards,
> Royal
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Re: [sumo-user] Increasing the density

[Jakob Erdmann]

I'm not sure what kind of links are useful to you if you find those two
suggestions unclear.
- The tutorial at https://sumo.dlr.de/docs/Tutorials/FundamentalDiagram.html
which you already read, introduced the concept of reducing the speed
locally to increase traffic density. A traffic light has the same effect
since it periodically reduces the speed to 0 by switching to red. I
sincerely hope you are able to find out about traffic lights in SUMO by
reading the documentation or searching google for "sumo traffic light"
- the concept of traffic from multiple edges which merges at an
intersection is so very basic that there is no documentation for it. Doing
any of the introductory tutorials should give you the necessary knowledge (
https://sumo.dlr.de/docs/Tutorials/index.html#beginner_tutorials).

regards,
Jakob


Am Mo., 24. Jan. 2022 um 15:21 Uhr schrieb Royal Bhandari <
royalbhanda...@gmail.com>:

> Hello Jakob,
>
> By any chance do you happen to have the links for:
>
> - modify local density with traffic lights
> - merge traffic from multiple edges
>
> Regards,
> Royal
>
> On Mon, Jan 24, 2022 at 1:43 AM Jakob Erdmann 
> wrote:
>
>> Possibilities:
>> - increase insertion density (
>> https://sumo.dlr.de/docs/Simulation/RoadCapacity.html)
>> - modify local density with traffic lights
>> - merge traffic from multiple edges
>>
>> Am So., 23. Jan. 2022 um 00:57 Uhr schrieb Royal Bhandari <
>> royalbhanda...@gmail.com>:
>>
>>> Hello,
>>>
>>> How can I increase the density to obtain a density vs flow plot? There
>>> is only few information on
>>> https://sumo.dlr.de/docs/Tutorials/FundamentalDiagram.html
>>>
>>> Regards,
>>> Royal
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Re: [sumo-user] TraCI: Close a lane to all Vehicles for a given time

[Jakob Erdmann]

1.
disallow everything: setDisallowed(laneID, ["all"])
alternatively, allow only a singe class that probably isn't used in your
vehicle input: setAllowed(laneID, ["authority"]). Bonus: the lane will be
orange in the GUI.

2.
Not with traci, but you can do time-based permission changes with XML
input: https://sumo.dlr.de/docs/Simulation/Rerouter.html#closing_a_lane


Am Mo., 24. Jan. 2022 um 19:11 Uhr schrieb Jordan Mc Connon <
jordan.mcconn...@mail.dcu.ie>:

> Hi,
> I'm using TraCI's python API to control my SUMO simulation
> and need to close off (for all vehicle types) a given Lane, *L*, for some
> period of time, *D*.
>
> traci.lane.setDisallowed()
>
> Seems to be the only solution to close the lane off, however it requires
> me to specify a list of all vehicle classes I want to disallow (and unlike
> the setAllowed command doesn't assume that empty arguments means all
> vehicles).
>
> (1) I don't know what this list needs to be so it disallows all  vehicles,
> if someone could provide that, it would be much appreciated.
>
> (2) In terms of re-allowing the Lane after time D, I am currently using a
> datastructure in the python script and doing the time keeping manually, is
> there a better way to do this via TraCI?
>
> Regards,
> Jordan McConnon
>
>
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Re: [sumo-user] Modeling human drivers' large reaction time

[Mohit Garg via sumo-user]

Thanks Jakob.

On Mon, 24 Jan 2022 at 07:56, Jakob Erdmann  wrote:

> Using action step length is the recommended way if the reaction times are
> variable over your vehicle population or if you need high-frequency
> position information.
> Otherwise you could also increase the simulation step-length.
>
> If you mostly want to capture the differences in following distances
> (which drivers usually increase in response to self-awareness of reaction
> times), you could simply modify the driver 'tau' values instead (but
> drivers would then react with whatever step-length is set).
>
> Am So., 23. Jan. 2022 um 14:19 Uhr schrieb Mohit Garg via sumo-user <
> sumo-user@eclipse.org>:
>
>> Hi guys,
>>
>> I am modeling human drivers' large reaction time using a large value of
>> action step length. Is this a correct approach? I am wondering whether some
>> other approaches are available to model large reaction time in simulations?
>>
>> Any suggestion would be appreciated.
>>
>> Thanks.
>>
>> Kind regards,
>> Mohit
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[sumo-user] collision avoidance mode in ACC

[Royal Bhandari]

Hello,

Is the Collision avoidance mode developed by TransAID implemented in the
default ACC model?

Regards,
Royal
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[sumo-user] TraCI: Close a lane to all Vehicles for a given time

[Jordan Mc Connon]

Hi,
I'm using TraCI's python API to control my SUMO simulation
and need to close off (for all vehicle types) a given Lane, *L*, for some
period of time, *D*.

traci.lane.setDisallowed()

Seems to be the only solution to close the lane off, however it requires me
to specify a list of all vehicle classes I want to disallow (and unlike the
setAllowed command doesn't assume that empty arguments means all vehicles).

(1) I don't know what this list needs to be so it disallows all  vehicles,
if someone could provide that, it would be much appreciated.

(2) In terms of re-allowing the Lane after time D, I am currently using a
datastructure in the python script and doing the time keeping manually, is
there a better way to do this via TraCI?

Regards,
Jordan McConnon

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[sumo-user] Fwd: Which Scheme for a simulation campaign with several replications ?

[Hervé Diedie]

-- Forwarded message -
De : Hervé Diedie 
Date: lun. 24 janv. 2022 à 09:26
Subject: Which Scheme for a simulation campaign with several replications ?
To: Sumo project User discussions 


During a simulation campaign with 30 replications

What is the best scheme  ?

Generate 30 different flow files from randomTrips.py   with 30 different
seeds (using the -- seed option)
to produce 30 different .rou.xml files  for 30  .sumocfg one

or

Generate a flow file from randomTrips.py
then a create a .rou.xml file  further a .sumocfg file
and call 30 times this .sumocfg with 30 different seeds (using the --seed
option)

best regards.
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[sumo-user] Looping over various period of edgeresults

[Royal Bhandari]

Hello,

I have a edgeresult output file with freq=60. And my simulation time is
over 2000secs. Hence, I have multiple outputs for each of my edges for the
various intervals. How do I loop over the various period of edgeresult via
Traci?  Please advise.

Regards,
Royal
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Re: [sumo-user] Increasing the density

[Royal Bhandari]

Hello Jakob,

By any chance do you happen to have the links for:

- modify local density with traffic lights
- merge traffic from multiple edges

Regards,
Royal

On Mon, Jan 24, 2022 at 1:43 AM Jakob Erdmann  wrote:

> Possibilities:
> - increase insertion density (
> https://sumo.dlr.de/docs/Simulation/RoadCapacity.html)
> - modify local density with traffic lights
> - merge traffic from multiple edges
>
> Am So., 23. Jan. 2022 um 00:57 Uhr schrieb Royal Bhandari <
> royalbhanda...@gmail.com>:
>
>> Hello,
>>
>> How can I increase the density to obtain a density vs flow plot? There is
>> only few information on
>> https://sumo.dlr.de/docs/Tutorials/FundamentalDiagram.html
>>
>> Regards,
>> Royal
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Re: [sumo-user] Regarding Queue Length

[Jakob Erdmann]

SUMO "knows" all the queued vehicles so no clever math is needed. It's
simply a threshold for "halting" speed (configurable for laneAreaDetector)
and the sum of the lengths and gaps.

Am Mo., 24. Jan. 2022 um 10:20 Uhr schrieb Radha Reddy <
radha.reddy@gmail.com>:

> Many thanks Jakob,
>
> Are there any mathematical formulations behind this queue length in meters?
>
> Regards
> Radha
>
> On Mon, Jan 24, 2022 at 8:18 AM Jakob Erdmann 
> wrote:
>
>> queue-output only gives output in meters but the laneArea detector also
>> provides jam lengths in vehicle number. See
>> https://sumo.dlr.de/docs/Simulation/Output/Lanearea_Detectors_%28E2%29.html#generated_output
>>
>> Am So., 23. Jan. 2022 um 17:06 Uhr schrieb Radha Reddy <
>> radha.reddy@gmail.com>:
>>
>>> Hello Again,
>>>
>>> I have been wondering if there is any formulation utilized in estimating
>>> the queue length by the SUMO framework.
>>>
>>> Does it only produce the queue length in meters?
>>>
>>> Regards
>>> Radha
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[sumo-user] Which Scheme for a simulation campaign with several replications ?

[Hervé Diedie]

During a simulation campaign with 30 replications

What is the best scheme  ?

Generate 30 different flow files from randomTrips.py   with 30 different
seeds (using the -- seed option)
to produce 30 different .rou.xml files  for 30  .sumocfg one

or

Generate a flow file from randomTrips.py
then a create a .rou.xml file  further a .sumocfg file
and call 30 times this .sumocfg with 30 different seeds (using the --seed
option)

best regards.
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Re: [sumo-user] Regarding Queue Length

[Radha Reddy]

Many thanks Jakob,

Are there any mathematical formulations behind this queue length in meters?

Regards
Radha

On Mon, Jan 24, 2022 at 8:18 AM Jakob Erdmann  wrote:

> queue-output only gives output in meters but the laneArea detector also
> provides jam lengths in vehicle number. See
> https://sumo.dlr.de/docs/Simulation/Output/Lanearea_Detectors_%28E2%29.html#generated_output
>
> Am So., 23. Jan. 2022 um 17:06 Uhr schrieb Radha Reddy <
> radha.reddy@gmail.com>:
>
>> Hello Again,
>>
>> I have been wondering if there is any formulation utilized in estimating
>> the queue length by the SUMO framework.
>>
>> Does it only produce the queue length in meters?
>>
>> Regards
>> Radha
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Re: [sumo-user] simpla

[Jakob Erdmann]

In your vTypeMap, change the id 'orig_automated' to 'automated'.

Am Sa., 22. Jan. 2022 um 08:25 Uhr schrieb Yajun She :

> Hello,
>
> I tried to implement 'simpla' to create platoon using the following simpla
> configuration file and route file:
> 
> 
>  follower="follower_automated" />
> 
> 
> 
> 
> 
> 
> 
> 
>
> 
>  sigma="0.5" length="5" maxSpeed="60" color="white"/>
> 
> 
> 
>
> 
> 
>
>  vehsPerHour="1600"/>
>  vehsPerHour="1600"/>
> 
>
> However, I am facing this issue while loading "simpla" configuration file:
> C:\Python37\python.exe C:/pythonProject/main.py
> 1.0: WARNING: No vType specified for PlatoonMode 'LEADER' for vehicle
> 'flow_0.0'. Behavior within platoon is NOT altered. This warning is issued
> only once. (PVehicle)
> 1.0: WARNING: No vType specified for PlatoonMode 'FOLLOWER' for vehicle
> 'flow_0.0'. Behavior within platoon is NOT altered. This warning is issued
> only once. (PVehicle)
> 1.0: WARNING: No vType specified for PlatoonMode 'CATCHUP' for vehicle
> 'flow_0.0'. Behavior within platoon is NOT altered. This warning is issued
> only once. (PVehicle)
> 1.0: WARNING: No vType specified for PlatoonMode 'CATCHUP_FOLLOWER' for
> vehicle 'flow_0.0'. Behavior within platoon is NOT altered. This warning is
> issued only once. (PVehicle)
>
> I don't know if I have to change any other configuration, hope anyone of
> you can help me out!
>
> Best regards and thanks,
> Yajun
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Re: [sumo-user] [EXTERNAL] Re: Collisions

[Jakob Erdmann]

The intended design of the simulation is to never create a collision on
insertion unless this is forced via TraCI. Thus, your observation indicates
a bug that should be fixed.
If you could send me a minimal version of xml input files (i.e. as a zip
archive) that reproduce the faulty behavior, this would aid in fixing the
problem.
Collisions during the 'move' stage might also be due to "dangerous" model
parameters or limitations of the CACC model. I'd have too look at the
simulation myself to determine whether it's a bug or a feature (hence input
files would be helpful).

Am Mo., 24. Jan. 2022 um 09:14 Uhr schrieb Pradeep Viyaluru Harinath <
pradeep.viyaluruharin...@utsa.edu>:

> Appears to be my understanding is wrong, the documentation (VehicleInsertion
> - SUMO Documentation (dlr.de)
> )
> states the sloppy insert is preferred all the time. Not sure on the error
> received.
>
>
>
> Regards,
>
> V.H.Pradeep
>
>
>
> *From:* sumo-user  *On Behalf Of *Pradeep
> Viyaluru Harinath
> *Sent:* Monday, January 24, 2022 2:00 AM
> *To:* Sumo project User discussions 
> *Subject:* Re: [sumo-user] [EXTERNAL] Re: Collisions
>
>
>
> I suppose the flow is so huge that the segment reaches the capacity even
> if we could insert the vehicle this is potentially causing the collision to
> take place. Let me know if my understanding is incorrect here.
>
>
>
> I have another instance where the collision occurs because of the
> ‘stage=move’ as attached, what could be the potential reason for that
>
>
>
> Regards,
>
> V.H.Pradeep
>
>
>
> *From:* sumo-user  *On Behalf Of *Pradeep
> Viyaluru Harinath
> *Sent:* Monday, January 24, 2022 1:53 AM
> *To:* Sumo project User discussions 
> *Subject:* Re: [sumo-user] [EXTERNAL] Re: Collisions
>
>
>
> This is the route file for a base scenario similar to what is being
> observed I have been modifying the available default attributes , to model
> the flow. When the flow supplied is small it performs well with the
> exceptions that I receive warnings however when the flow is increased say
> doubled collisions begin to take place due to unavailability of headways I
> suppose.
>
>
>
> Regards,
>
> Pradeep V.H
>
>
>
> *From:* sumo-user  *On Behalf Of *Jakob
> Erdmann
> *Sent:* Monday, January 24, 2022 1:45 AM
> *To:* Sumo project User discussions 
> *Subject:* Re: [sumo-user] [EXTERNAL] Re: Collisions
>
>
>
> Please provide a minimal version of your scenario that reproduces these
> collisions (I'm particularly interested in  'stage=insertion').
>
>
>
> Am Mo., 24. Jan. 2022 um 08:41 Uhr schrieb Pradeep Viyaluru Harinath <
> pradeep.viyaluruharin...@utsa.edu>:
>
> I have configuration file based on XMLs , all I do with Traci is to create
> a loop so that it starts the sumo on command prompt and keeps running
> without closing.
>
>
>
> Regards,
>
> V.H.Pradeep
>
>
>
> *From:* sumo-user  *On Behalf Of *Jakob
> Erdmann
> *Sent:* Monday, January 24, 2022 1:38 AM
> *To:* Sumo project User discussions 
> *Subject:* [EXTERNAL] Re: [sumo-user] Collisions
>
>
>
> *  **EXTERNAL EMAIL***
>   This email originated outside of The University of Texas at San Antonio.
>   Please exercise caution when clicking on links or opening attachments.
>
>
>
> Are you using traci to insert / move the vehicles or can you create these
> collisions with XML inputs alone?
>
>
>
> Am Mo., 24. Jan. 2022 um 08:22 Uhr schrieb Pradeep Viyaluru Harinath <
> pradeep.viyaluruharin...@utsa.edu>:
>
> Hello all,
>
> I am using a CACC model and I reduced the step size to 0.1 as advised
> earlier. Initially the number of teleports were low but when I started
> increasing the flow the vehicles started colliding eventually (as in
> attached) ending up teleported is there some way I can avoid this?
>
>
>
> Regards,
>
> Pradeep V.H
>
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Re: [sumo-user] Question about Energy Model used in SUMO

[Jakob Erdmann]

In the current model, the power requirement is scaled directly with the
propulsion efficiency at all speeds. Thus, the energy consumption will be
doubled if the efficiency is cut in half.
By default, vehicle behavior will not be affected otherwise. The sole
exception is the elechybrid device. It actually limits vehicle acceleration
by the available power and thereby creates a mechanism by which propulsion
efficiency impacts vehicle behavior.

Am Mo., 24. Jan. 2022 um 02:15 Uhr schrieb Ifezue Obiako <
vincentobi...@gmail.com>:

> Hello Everyone
>
> I was adjusting the propulsion efficiency in my SUMO model and I was
> wondering how big of a difference does the propulsion efficiency affect a
> vehicle's performance in SUMO (assuming all other parameters are held
> constant)? For example, I had a scenario that I was running that had a
> propulsion efficiency of 0.95 and a different scenario with a propulsion
> efficiency of 0.44.
>
> Thank you
> Ifezue
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Re: [sumo-user] Regarding Queue Length

[Jakob Erdmann]

queue-output only gives output in meters but the laneArea detector also
provides jam lengths in vehicle number. See
https://sumo.dlr.de/docs/Simulation/Output/Lanearea_Detectors_%28E2%29.html#generated_output

Am So., 23. Jan. 2022 um 17:06 Uhr schrieb Radha Reddy <
radha.reddy@gmail.com>:

> Hello Again,
>
> I have been wondering if there is any formulation utilized in estimating
> the queue length by the SUMO framework.
>
> Does it only produce the queue length in meters?
>
> Regards
> Radha
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Re: [sumo-user] No module named 'matplotlib'

[Jakob Erdmann]

There currently isn't support for this but there are plans to add this for
future versions (https://github.com/eclipse/sumo/issues/10026).
For now, you have to do your own post-processing of edgeData.

Am So., 23. Jan. 2022 um 16:28 Uhr schrieb Royal Bhandari <
royalbhanda...@gmail.com>:

> Thanks got it. However, I have a question.
>
> This plotXMLAttributes.py is used to show the density vs volume plot for
> individual edges. Is there a way to represent the av density vs av volume
> of the specified edges only or av density vs av volume of the whole network?
>
> Regards,
> Royal
>
> On Sun, Jan 23, 2022 at 2:00 AM Harald Schaefer 
> wrote:
>
>> Hello,
>>
>> You must add the place, where you have installed matplotlib to the
>> PYTHONPATH variable.
>>
>> Search the internet for "python windows PYTHONPATH" for more info
>>
>> Regards, Harald
>> Am 23.01.22 um 07:15 schrieb Royal Bhandari:
>>
>> Hello,
>>
>> I am trying to use plotXMLAttributes.py but it gives me an error (see
>> attached picture). I already have matplotlib installed. Why is that error
>> showing?
>>
>> Regards,
>> Royal
>>
>>
>> [image: image.png]
>>
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Re: [sumo-user] [EXTERNAL] Re: Collisions

[Pradeep Viyaluru Harinath]

Appears to be my understanding is wrong, the documentation (VehicleInsertion - 
SUMO Documentation 
(dlr.de))
 states the sloppy insert is preferred all the time. Not sure on the error 
received.

Regards,
V.H.Pradeep

From: sumo-user  On Behalf Of Pradeep Viyaluru 
Harinath
Sent: Monday, January 24, 2022 2:00 AM
To: Sumo project User discussions 
Subject: Re: [sumo-user] [EXTERNAL] Re: Collisions

I suppose the flow is so huge that the segment reaches the capacity even if we 
could insert the vehicle this is potentially causing the collision to take 
place. Let me know if my understanding is incorrect here.

I have another instance where the collision occurs because of the 'stage=move' 
as attached, what could be the potential reason for that

Regards,
V.H.Pradeep

From: sumo-user 
mailto:sumo-user-boun...@eclipse.org>> On Behalf 
Of Pradeep Viyaluru Harinath
Sent: Monday, January 24, 2022 1:53 AM
To: Sumo project User discussions 
mailto:sumo-user@eclipse.org>>
Subject: Re: [sumo-user] [EXTERNAL] Re: Collisions

This is the route file for a base scenario similar to what is being observed I 
have been modifying the available default attributes , to model the flow. When 
the flow supplied is small it performs well with the exceptions that I receive 
warnings however when the flow is increased say doubled collisions begin to 
take place due to unavailability of headways I suppose.

Regards,
Pradeep V.H

From: sumo-user 
mailto:sumo-user-boun...@eclipse.org>> On Behalf 
Of Jakob Erdmann
Sent: Monday, January 24, 2022 1:45 AM
To: Sumo project User discussions 
mailto:sumo-user@eclipse.org>>
Subject: Re: [sumo-user] [EXTERNAL] Re: Collisions

Please provide a minimal version of your scenario that reproduces these 
collisions (I'm particularly interested in  'stage=insertion').

Am Mo., 24. Jan. 2022 um 08:41 Uhr schrieb Pradeep Viyaluru Harinath 
mailto:pradeep.viyaluruharin...@utsa.edu>>:
I have configuration file based on XMLs , all I do with Traci is to create a 
loop so that it starts the sumo on command prompt and keeps running without 
closing.

Regards,
V.H.Pradeep

From: sumo-user 
mailto:sumo-user-boun...@eclipse.org>> On Behalf 
Of Jakob Erdmann
Sent: Monday, January 24, 2022 1:38 AM
To: Sumo project User discussions 
mailto:sumo-user@eclipse.org>>
Subject: [EXTERNAL] Re: [sumo-user] Collisions

  **EXTERNAL EMAIL**
  This email originated outside of The University of Texas at San Antonio.
  Please exercise caution when clicking on links or opening attachments.


Are you using traci to insert / move the vehicles or can you create these 
collisions with XML inputs alone?

Am Mo., 24. Jan. 2022 um 08:22 Uhr schrieb Pradeep Viyaluru Harinath 
mailto:pradeep.viyaluruharin...@utsa.edu>>:
Hello all,
I am using a CACC model and I reduced the step size to 0.1 as advised earlier. 
Initially the number of teleports were low but when I started increasing the 
flow the vehicles started colliding eventually (as in attached) ending up 
teleported is there some way I can avoid this?

Regards,
Pradeep V.H
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Re: [sumo-user] [EXTERNAL] Re: Collisions

[Pradeep Viyaluru Harinath]

I suppose the flow is so huge that the segment reaches the capacity even if we 
could insert the vehicle this is potentially causing the collision to take 
place. Let me know if my understanding is incorrect here.

I have another instance where the collision occurs because of the 'stage=move' 
as attached, what could be the potential reason for that

Regards,
V.H.Pradeep

From: sumo-user  On Behalf Of Pradeep Viyaluru 
Harinath
Sent: Monday, January 24, 2022 1:53 AM
To: Sumo project User discussions 
Subject: Re: [sumo-user] [EXTERNAL] Re: Collisions

This is the route file for a base scenario similar to what is being observed I 
have been modifying the available default attributes , to model the flow. When 
the flow supplied is small it performs well with the exceptions that I receive 
warnings however when the flow is increased say doubled collisions begin to 
take place due to unavailability of headways I suppose.

Regards,
Pradeep V.H

From: sumo-user 
mailto:sumo-user-boun...@eclipse.org>> On Behalf 
Of Jakob Erdmann
Sent: Monday, January 24, 2022 1:45 AM
To: Sumo project User discussions 
mailto:sumo-user@eclipse.org>>
Subject: Re: [sumo-user] [EXTERNAL] Re: Collisions

Please provide a minimal version of your scenario that reproduces these 
collisions (I'm particularly interested in  'stage=insertion').

Am Mo., 24. Jan. 2022 um 08:41 Uhr schrieb Pradeep Viyaluru Harinath 
mailto:pradeep.viyaluruharin...@utsa.edu>>:
I have configuration file based on XMLs , all I do with Traci is to create a 
loop so that it starts the sumo on command prompt and keeps running without 
closing.

Regards,
V.H.Pradeep

From: sumo-user 
mailto:sumo-user-boun...@eclipse.org>> On Behalf 
Of Jakob Erdmann
Sent: Monday, January 24, 2022 1:38 AM
To: Sumo project User discussions 
mailto:sumo-user@eclipse.org>>
Subject: [EXTERNAL] Re: [sumo-user] Collisions

  **EXTERNAL EMAIL**
  This email originated outside of The University of Texas at San Antonio.
  Please exercise caution when clicking on links or opening attachments.


Are you using traci to insert / move the vehicles or can you create these 
collisions with XML inputs alone?

Am Mo., 24. Jan. 2022 um 08:22 Uhr schrieb Pradeep Viyaluru Harinath 
mailto:pradeep.viyaluruharin...@utsa.edu>>:
Hello all,
I am using a CACC model and I reduced the step size to 0.1 as advised earlier. 
Initially the number of teleports were low but when I started increasing the 
flow the vehicles started colliding eventually (as in attached) ending up 
teleported is there some way I can avoid this?

Regards,
Pradeep V.H
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