[sumo-user] Question about the model

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[sumo-user] Question about the model

billabong12321
When I do not specify any vehicle following model and only specify the speeds and acceleration, what is the mobility model used ?

I use -

<routes>
   <vType id="car" type="passenger" length="5" maxSpeed="25" accel="1" decel="1" sigma="0"/>
   <flow id="carflow" type="car" beg="0" end="0" number="50" departPos="free" from="edge1" to="edge2" />
</routes>

So what is the mobility mode used in my model ?

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Re: [sumo-user] Question about the model

Olaf.BanseBueno

Von: [hidden email] <[hidden email]> im Auftrag von Biplav Choudhury <[hidden email]>
Gesendet: Samstag, 11. Juli 2020 23:48:50
An: [hidden email]
Betreff: [sumo-user] Question about the model
 
When I do not specify any vehicle following model and only specify the speeds and acceleration, what is the mobility model used ?

I use -

<routes>
   <vType id="car" type="passenger" length="5" maxSpeed="25" accel="1" decel="1" sigma="0"/>
   <flow id="carflow" type="car" beg="0" end="0" number="50" departPos="free" from="edge1" to="edge2" />
</routes>

So what is the mobility mode used in my model ?

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Re: [sumo-user] Question about the model

billabong12321
Thanks for the quick response. I read the paper  where the modifications on the default Krauss model are described. One other question that I have is why is it called a car following model, as car following refers to some sort of platoon where there is a leader and there are follower vehicles. Vehicles can overtake their leaders as per the paper, so it doesn't appear as a platoon scenario.

In short, are car following mode (the default model in SUMO) ls a general mobility model or does it represent a specific scenario ?

On Sat, Jul 11, 2020 at 7:48 PM <[hidden email]> wrote:

Von: [hidden email] <[hidden email]> im Auftrag von Biplav Choudhury <[hidden email]>
Gesendet: Samstag, 11. Juli 2020 23:48:50
An: [hidden email]
Betreff: [sumo-user] Question about the model
 
When I do not specify any vehicle following model and only specify the speeds and acceleration, what is the mobility model used ?

I use -

<routes>
   <vType id="car" type="passenger" length="5" maxSpeed="25" accel="1" decel="1" sigma="0"/>
   <flow id="carflow" type="car" beg="0" end="0" number="50" departPos="free" from="edge1" to="edge2" />
</routes>

So what is the mobility mode used in my model ?
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Re: [sumo-user] Question about the model

behrisch
Administrator
Hi,
it is called "car following" because it describes only the longitudinal
behavior but not lane change and other lateral movements. Also right of
way rules and other aspects of moving over a junction are not modelled here.

Best regards,
Michael

Am 12.07.20 um 03:15 schrieb Biplav Choudhury:

> Thanks for the quick response. I read the paper
> <https://link.springer.com/chapter/10.1007%2F978-3-319-15024-6_7> where
> the modifications on the default Krauss model are described. One other
> question that I have is /why is it called a car following model/, as
> /car following/ refers to some sort of platoon where there is a leader
> and there are follower vehicles. Vehicles can overtake their leaders as
> per the paper
> <https://link.springer.com/chapter/10.1007%2F978-3-319-15024-6_7>, so it
> doesn't appear as a platoon scenario.
>
> In short, are /car following/ mode (the default model in SUMO) ls a
> general mobility model or does it represent a specific scenario ?
>
> On Sat, Jul 11, 2020 at 7:48 PM <[hidden email]
> <mailto:[hidden email]>> wrote:
>
>     Hi Biplav,
>
>
>     "The default model is a modification of the model defined by Stefan
>     Krauß" (https://sumo.dlr.de/pdf/KraussDiss.pdf)
>
>
>     https://sumo.dlr.de/docs/Definition_of_Vehicles,_Vehicle_Types,_and_Routes.html#default_krauss_model_description
>
>
>     https://sumo.dlr.de/docs/Definition_of_Vehicles,_Vehicle_Types,_and_Routes.html#car-following_models
>
>
>
>     ------------------------------------------------------------------------
>     *Von:* [hidden email]
>     <mailto:[hidden email]>
>     <[hidden email]
>     <mailto:[hidden email]>> im Auftrag von Biplav
>     Choudhury <[hidden email] <mailto:[hidden email]>>
>     *Gesendet:* Samstag, 11. Juli 2020 23:48:50
>     *An:* [hidden email] <mailto:[hidden email]>
>     *Betreff:* [sumo-user] Question about the model
>      
>     When I do not specify any vehicle following model and only specify
>     the speeds and acceleration, what is the mobility model used ?
>
>     I use -
>
>     <routes>
>        <vType id="car" type="passenger" length="5" maxSpeed="25" accel="1" decel="1" sigma="0"/>
>        <flow id="carflow" type="car" beg="0" end="0" number="50" departPos="free" from="edge1" to="edge2" />
>     </routes>
>
>
>     So what is the mobility mode used in my model ?
>     _______________________________________________
>     sumo-user mailing list
>     [hidden email] <mailto:[hidden email]>
>     To unsubscribe from this list, visit
>     https://www.eclipse.org/mailman/listinfo/sumo-user
>
>
> _______________________________________________
> sumo-user mailing list
> [hidden email]
> To unsubscribe from this list, visit https://www.eclipse.org/mailman/listinfo/sumo-user
>


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Re: [sumo-user] Question about the model

billabong12321
I see, so there would be a default lane changing behavior too ?

And am I right in assuming that in a general scenario,  car following behavior + lane changing behavior = overall behavior ? 

On Mon, Jul 13, 2020, 10:28 AM Michael Behrisch <[hidden email]> wrote:
Hi,
it is called "car following" because it describes only the longitudinal
behavior but not lane change and other lateral movements. Also right of
way rules and other aspects of moving over a junction are not modelled here.

Best regards,
Michael

Am 12.07.20 um 03:15 schrieb Biplav Choudhury:
> Thanks for the quick response. I read the paper
> <https://link.springer.com/chapter/10.1007%2F978-3-319-15024-6_7> where
> the modifications on the default Krauss model are described. One other
> question that I have is /why is it called a car following model/, as
> /car following/ refers to some sort of platoon where there is a leader
> and there are follower vehicles. Vehicles can overtake their leaders as
> per the paper
> <https://link.springer.com/chapter/10.1007%2F978-3-319-15024-6_7>, so it
> doesn't appear as a platoon scenario.
>
> In short, are /car following/ mode (the default model in SUMO) ls a
> general mobility model or does it represent a specific scenario ?
>
> On Sat, Jul 11, 2020 at 7:48 PM <[hidden email]
> <mailto:[hidden email]>> wrote:
>
>     Hi Biplav,
>
>
>     "The default model is a modification of the model defined by Stefan
>     Krauß" (https://sumo.dlr.de/pdf/KraussDiss.pdf)
>
>
>     https://sumo.dlr.de/docs/Definition_of_Vehicles,_Vehicle_Types,_and_Routes.html#default_krauss_model_description
>
>
>     https://sumo.dlr.de/docs/Definition_of_Vehicles,_Vehicle_Types,_and_Routes.html#car-following_models
>
>
>
>     ------------------------------------------------------------------------
>     *Von:* [hidden email]
>     <mailto:[hidden email]>
>     <[hidden email]
>     <mailto:[hidden email]>> im Auftrag von Biplav
>     Choudhury <[hidden email] <mailto:[hidden email]>>
>     *Gesendet:* Samstag, 11. Juli 2020 23:48:50
>     *An:* [hidden email] <mailto:[hidden email]>
>     *Betreff:* [sumo-user] Question about the model
>      
>     When I do not specify any vehicle following model and only specify
>     the speeds and acceleration, what is the mobility model used ?
>
>     I use -
>
>     <routes>
>        <vType id="car" type="passenger" length="5" maxSpeed="25" accel="1" decel="1" sigma="0"/>
>        <flow id="carflow" type="car" beg="0" end="0" number="50" departPos="free" from="edge1" to="edge2" />
>     </routes>
>
>
>     So what is the mobility mode used in my model ?
>     _______________________________________________
>     sumo-user mailing list
>     [hidden email] <mailto:[hidden email]>
>     To unsubscribe from this list, visit
>     https://www.eclipse.org/mailman/listinfo/sumo-user
>
>
> _______________________________________________
> sumo-user mailing list
> [hidden email]
> To unsubscribe from this list, visit https://www.eclipse.org/mailman/listinfo/sumo-user
>


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Re: [sumo-user] Question about the model

behrisch
Administrator
Hi,
yes, there is a default lane change model too, called LC2013. A general
scenario is a very "general" thing ;-), I would at least add the
junction model (right of way etc.) to the list. But of course things
like interaction with pedestrians, route choice etc. play their role as
well.

Best regards,
Michael

Am 13.07.20 um 17:08 schrieb Biplav Choudhury:

> I see, so there would be a default lane changing behavior too ?
>
> And am I right in assuming that in a general scenario,  car following
> behavior + lane changing behavior = overall behavior ? 
>
> On Mon, Jul 13, 2020, 10:28 AM Michael Behrisch <[hidden email]
> <mailto:[hidden email]>> wrote:
>
>     Hi,
>     it is called "car following" because it describes only the longitudinal
>     behavior but not lane change and other lateral movements. Also right of
>     way rules and other aspects of moving over a junction are not
>     modelled here.
>
>     Best regards,
>     Michael
>
>     Am 12.07.20 um 03:15 schrieb Biplav Choudhury:
>     > Thanks for the quick response. I read the paper
>     >
>     <https://link.springer.com/chapter/10.1007%2F978-3-319-15024-6_7> where
>     > the modifications on the default Krauss model are described. One other
>     > question that I have is /why is it called a car following model/, as
>     > /car following/ refers to some sort of platoon where there is a leader
>     > and there are follower vehicles. Vehicles can overtake their
>     leaders as
>     > per the paper
>     > <https://link.springer.com/chapter/10.1007%2F978-3-319-15024-6_7>,
>     so it
>     > doesn't appear as a platoon scenario.
>     >
>     > In short, are /car following/ mode (the default model in SUMO) ls a
>     > general mobility model or does it represent a specific scenario ?
>     >
>     > On Sat, Jul 11, 2020 at 7:48 PM <[hidden email]
>     <mailto:[hidden email]>
>     > <mailto:[hidden email] <mailto:[hidden email]>>>
>     wrote:
>     >
>     >     Hi Biplav,
>     >
>     >
>     >     "The default model is a modification of the model defined by
>     Stefan
>     >     Krauß" (https://sumo.dlr.de/pdf/KraussDiss.pdf)
>     >
>     >
>     >   
>      https://sumo.dlr.de/docs/Definition_of_Vehicles,_Vehicle_Types,_and_Routes.html#default_krauss_model_description
>     >
>     >
>     >   
>      https://sumo.dlr.de/docs/Definition_of_Vehicles,_Vehicle_Types,_and_Routes.html#car-following_models
>     >
>     >
>     >
>     >   
>      ------------------------------------------------------------------------
>     >     *Von:* [hidden email]
>     <mailto:[hidden email]>
>     >     <mailto:[hidden email]
>     <mailto:[hidden email]>>
>     >     <[hidden email]
>     <mailto:[hidden email]>
>     >     <mailto:[hidden email]
>     <mailto:[hidden email]>>> im Auftrag von Biplav
>     >     Choudhury <[hidden email] <mailto:[hidden email]>
>     <mailto:[hidden email] <mailto:[hidden email]>>>
>     >     *Gesendet:* Samstag, 11. Juli 2020 23:48:50
>     >     *An:* [hidden email] <mailto:[hidden email]>
>     <mailto:[hidden email] <mailto:[hidden email]>>
>     >     *Betreff:* [sumo-user] Question about the model
>     >      
>     >     When I do not specify any vehicle following model and only specify
>     >     the speeds and acceleration, what is the mobility model used ?
>     >
>     >     I use -
>     >
>     >     <routes>
>     >        <vType id="car" type="passenger" length="5" maxSpeed="25"
>     accel="1" decel="1" sigma="0"/>
>     >        <flow id="carflow" type="car" beg="0" end="0" number="50"
>     departPos="free" from="edge1" to="edge2" />
>     >     </routes>
>     >
>     >
>     >     So what is the mobility mode used in my model ?
>     >     _______________________________________________
>     >     sumo-user mailing list
>     >     [hidden email] <mailto:[hidden email]>
>     <mailto:[hidden email] <mailto:[hidden email]>>
>     >     To unsubscribe from this list, visit
>     >     https://www.eclipse.org/mailman/listinfo/sumo-user
>     >
>     >
>     > _______________________________________________
>     > sumo-user mailing list
>     > [hidden email] <mailto:[hidden email]>
>     > To unsubscribe from this list, visit
>     https://www.eclipse.org/mailman/listinfo/sumo-user
>     >
>
>
>     _______________________________________________
>     sumo-user mailing list
>     [hidden email] <mailto:[hidden email]>
>     To unsubscribe from this list, visit
>     https://www.eclipse.org/mailman/listinfo/sumo-user
>
>
> _______________________________________________
> sumo-user mailing list
> [hidden email]
> To unsubscribe from this list, visit https://www.eclipse.org/mailman/listinfo/sumo-user
>


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Re: [sumo-user] Question about the model

mrayur
Hi Michael,

Could I only use the default car-following model? I want to rule the lateral
behavior in other ways.

Actually, I tested the my reinforcement learning algorithm successfully. But
only 10 actions are defined.
1)Maintain the lane and a=0[m/s2],
2)Left lane changing and a=0[m/s2],
3)Right lane changing and a=0[m/s2],
4)Maintain the lane and a=2[m/s2],
5)Left lane changing and a=2[m/s2],
6)Right lane changing and a=2[m/s2],
7)Maintain the lane and a=-2[m/s2],
8)Left lane changing and a=-2[m/s2]
9)Right lane changing and a=-2[m/s2],
10)Maintain the lane and hard brake at a=-4[m/s2]
But the acceleration should be continuous, so I wonder if I can only use the
default car-following model to make the simulation more realistic.

Best regards,
John



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