Hey Harald,
this is a good solution if you only consider the autobahn. The downside is that the speedFactor is also applied to all other streets with a mean speed of 45 km/h
when 50 km/h are allowed is not realistic as the mean speed in reality is more likely 55 km/h. Maybe I can somehow overcome this issue through the combination of different vehicle types. Thanks for your help!
Did you take a look at the distribution of vehicle speeds? My experience is that you could have a huge amount of vehicles going at 140 km/h with the center of the
distribution being not at 130 km/h. Make sure this isn’t the case!
Best regards
Simon
From: sumo-user-bounces@xxxxxxxxxxx <sumo-user-bounces@xxxxxxxxxxx>
On Behalf Of Harald Schaefer
Sent: Dienstag, 21. Juli 2020 09:46
To: sumo-user@xxxxxxxxxxx
Subject: Re: [sumo-user] Variation of maxSpeed
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:
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.
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
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
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
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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