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Re: [sumo-user] Variation of maxSpeed
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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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