Re: [sumo-user] Variation of maxSpeed

[Harald Schaefer <fechsaer@xxxxxxxxx>]

Hello Dillip,

the maxSpeed of the vehicle is 140 km/h, much less than the edge/lane speed, so I think the speedFactor is applied to the vehicle speed.

Greetings, Harald

Am 21.07.20 um 09:08 schrieb Tripplanner Mumbai:

Hello Harald,

As per your definitions, speed limit of highway = 180 km/h, and vehicle's speedFactor=0.9 which means that the vehicle can run upto 160km/h on the highway (of course speedDev and sigma will affect it). Please clarify and/or rectify my views.

thanks and regards,

Dillip Rout

On Tue, 21 Jul 2020 at 12:08, Harald Schaefer <fechsaer@xxxxxxxxx> wrote:

Hi Simon,

in my own Autobahn-Scenario I want to run cars around 130 km/h.

I used a vehicleType with a maxspeed of 140 km/h like

  <vType id="passenger" vClass="passenger" maxSpeed="38.888" speedFactor="0.9" speedDev="0.2" sigma="0.5">
        <param key="has.rerouting.device" value="true"/>

The highway has a speed limit of 50 m/s (= 180 km/h)

I get a distribution of speeds according to the fcd-output like

time = 739.0, N =  110 min =   53.3 max =  140.0 mean   =  131.0 dev =  13.8
time = 740.0, N =  110 min =   53.5 max =  139.9 mean   =  131.0 dev =  13.9
time = 741.0, N =  110 min =   55.5 max =  140.0 mean   =  131.2 dev =  14.1
time = 742.0, N =  109 min =   56.0 max =  140.0 mean   =  131.1 dev =  14.0

Greetings, Harald

Am 17.07.20 um 10:32 schrieb Simon.Frentrup@xxxxxxxxxx:

Hey Harald,

 

thanks for your reply. I’m using exactly this for streets with a speed limit, but I’m targeting the special case of the German autobahn.

 

As I understand it the simulation works as follows: If there are no speed limits, each vehicles drives it’s defined maxSpeed. The speedFactor is added to the maxSpeed, but if the driven speed exceeds the maxSpeed value, the speed is set back to it. Because of this there is no real speed distribution but just a los of cars driving at their maxSpeed.

 

Best regards

Simon

 

From: sumo-user-bounces@xxxxxxxxxxx <sumo-user-bounces@xxxxxxxxxxx> On Behalf Of Harald Schaefer
Sent: Freitag, 17. Juli 2020 09:43
To: sumo-user@xxxxxxxxxxx
Subject: Re: [sumo-user] Variation of maxSpeed

 

Hi Simon,

unfortunately I'm not the expert on this question, but there was a discussion in this mailing list on 2018-08-23.

Have you read these chapters?

https://sumo.dlr.de/docs/Definition_of_Vehicles,_Vehicle_Types,_and_Routes.html#defining_speed_limit_violations_explicitly

https://sumo.dlr.de/docs/Definition_of_Vehicles,_Vehicle_Types,_and_Routes.html#additional_remarks_on_speed_distributions

Greetings Harald

 

Am 16.07.20 um 09:55 schrieb Simon.Frentrup@xxxxxxxxxx:

Hello,

 

adjusting vehicle types I came across the problem that the maxSpeed is fix and the speedFactor doesn’t increase the speed above this value, but I want to get varying speeds even when there is no speed limit and no traffic on the German autobahn.

 

Is there a way to add variation to the maxSpeed without adding numerous vehicle types? (E.g. using a normal distribution like the speedFactor.)

 

Thanks and best regards

Simon

 

 

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