Re: [sumo-user] Variation of maxSpeed

Mon, 20 Jul 2020 23:40:00 -0700 

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.frent...@umlaut.com:


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-boun...@eclipse.org <sumo-user-boun...@eclipse.org> *On Behalf Of *Harald Schaefer 
*Sent:* Freitag, 17. Juli 2020 09:43
*To:* sumo-user@eclipse.org
*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://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fsumo.dlr.de%2Fdocs%2FDefinition_of_Vehicles%2C_Vehicle_Types%2C_and_Routes.html%23defining_speed_limit_violations_explicitly&data=02%7C01%7Csimon.frentrup%40umlaut.com%7Cb64c78290af5428123f908d82a251e70%7C58d65043cd9d409f828b59b40ef5f919%7C0%7C0%7C637305686203653176&sdata=4Dr%2B3xvxfj2%2F8zKtAZ%2FTDt6j7cDiqyu9X787TbQqzy8%3D&reserved=0>
https://sumo.dlr.de/docs/Definition_of_Vehicles,_Vehicle_Types,_and_Routes.html#additional_remarks_on_speed_distributions <https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fsumo.dlr.de%2Fdocs%2FDefinition_of_Vehicles%2C_Vehicle_Types%2C_and_Routes.html%23additional_remarks_on_speed_distributions&data=02%7C01%7Csimon.frentrup%40umlaut.com%7Cb64c78290af5428123f908d82a251e70%7C58d65043cd9d409f828b59b40ef5f919%7C0%7C0%7C637305686203653176&sdata=BKqsOcZxSECGoibSql7QKtdTwJHjlwTkpC8%2BL%2F7QB0A%3D&reserved=0> 

Greetings Harald
Am 16.07.20 um 09:55 schrieb simon.frent...@umlaut.com <mailto:simon.frent...@umlaut.com>: 

    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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