[sumo-user] Usage of SpeedFactor command

[Vaibhav R. <vr...@ri...>]

Hello Folks,
I am required to allow certain vehicles exceed the speed limit.
In past I have done that using speedfactor command which sets their speed
limit as a fraction of lane's speed limit.
I have been trying to do the same thing again but haven't been able to.

Observations and/or programming practice:
- The speed factor is been set for the desired vehicle in every time step.
- I am not getting any errors.
- The text file which I use to keep track of speed assignment shows that
vehicle has been assigned a speed higher than speed limit.
- I check the value of speedfactor after assignment using getSpeedFactor.
It shows the desired value.
- I checked the gui. There seems to be enough gap between vehicle which has
to accelerate and preceding vehicle. There's no indication that the vehicle
is trying to decelerate because of the low safe distance.

Please suggest what else I should check. I can share the sections of code.
Thanks.

Regards,
Vaibhav Rungta
Graduate Student - Industrial and Systems Engineering
Graduate Assistant - Toyota Production Systems Lab
Research Assistant - University Transport Research Center
585-754-7133


On Tue, Jan 3, 2017 at 2:13 PM, Vaibhav Rungta <vr2002@g.rit.edu> wrote:

> Hello Jakob,
> Thanks. I used the speed factor command and have been to make the desired
> change.
>
> Here are some of the commands I have used recently.
> Posting them on portal so that it might helpful for those having similar
> queries:
>
> traci.vehicle.setSpeedFactor(vehs, 1.2)
> -vehs represents the vehicle ID
>
> traci.vehicle.slowDown(vehs, v, k)
> -v represents the final velocity in m/s
> -k represents the time in ms. Please check the data type of k. It *must
> be an integer *otherwise you will get an error.
>
> Regards,
> Vaibhav Rungta
> Graduate Student - Industrial and Systems Engineering
> Graduate Assistant - Toyota Production Systems Lab
> Research Assistant - University Transport Research Center
> 585-754-7133 <(585)%20754-7133>
>
>
> On Tue, Jan 3, 2017 at 4:38 AM, Jakob Erdmann <nam...@go...>
> wrote:
>
>> this is done by specifying 'speed factor'  (0x5e)
>> see http://sumo.dlr.de/wiki/TraCI/Change_Vehicle_State
>> (multiplier for the lane speed limit, http://sumo.dlr.de/wiki/Defini
>> tion_of_Vehicles,_Vehicle_Types,_and_Routes#Vehicle_Types)
>>
>> regards,
>> Jakob
>>
>>
>>
>> 2016-12-31 21:13 GMT+01:00 Vaibhav Rungta <vr...@ri...>:
>>
>>> Hello Folks,
>>> Wishing you guys an exhilarating, prosperous and a healthy New Year :)
>>>
>>> I am working on an algorithm which involves speed calculation. Sometimes
>>> the speed required to provide better results will be more than the edge
>>> speed limit for certain vehicles. As we observe in real world, no one
>>> gets
>>> pulled over for driving 15-20% above speed limit for a short duration
>>> (10-15s). To simulate this I have to allow some vehicles to go faster.
>>>
>>> - I tried setMaxSpeed command but that seems to have a different purpose.
>>> - I thought of using variable speed limit but then that will allow all
>>> vehicles to go faster. This might increase the emissions and that's not
>>> what I want.
>>> - I am not sure if vehicle speed distribution will allow that, but again
>>> randomness may not allow those vehicles to go fast which I specifically
>>> want to go faster.
>>>
>>> I wish to accelerate only those vehicles which can make it through the
>>> intersection by slightly accelerating above speed limit.
>>> Kindly suggest how I may do this? Thank you.
>>>
>>> Regards,
>>> Vaibhav Rungta
>>> Graduate Student - Industrial and Systems Engineering
>>> Graduate Assistant - Toyota Production Systems Lab
>>> Research Assistant - University Transport Research Center
>>> 585-754-7133
>>> ------------------------------------------------------------
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>>
>>
>