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Re: [sumo-user] Car routing
Hi Michael, thank you for the return. I'll try to be more clear and specific.

I'm working in a Machine Learning that should help the traffic flow. In summary, I configured a flow to start at some point of network and the cars should arrive at the destination. In the middle of that, I calculate the number of arrived cars and take an action after some fixed number of steps.

What I'm trying to do, is (as you said before) influence the travel time changing the network aspects. For instance: At some point of simulation, if some lane is with high occupancy, I decrease it 'MaxSpeed' in order to make other lanes more interesting for the new inserted cars.

Correct me if I missunderstood, but cars use dijkstra to calculate the fastest way, right? I just need to understand the conditions that affect the weight of lanes to train my ML in a simple scenario: it involves just single lanes, one type of cars and a grid network generated by 'netgenerate' (3x3 or 4x4 nodes).

Thank you again.

2018-01-14 17:44 GMT-02:00 Michael Behrisch <oss@xxxxxxxxxxx>:
Hi,
the short answer is it takes the fastest route based on the current
travel times in the network (this describes the edge part, the lane part
is handled by the lane changing algorithm). There are multiple ways to
influence which travel times it assumes when calculating the fastest
path but maybe you can ask a more specific question here.

Best regards,
Michael

Am 13.01.2018 um 03:02 schrieb Pedro Matuck:
> Hello,
>
> Please, someone could indicate me the documentation where explain how
> cars make a decision when we just declare a flow?
>
> For example:
> I have the following declaration on my *.rou.xml file
>
> <routes xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
> xsi:noNamespaceSchemaLocation="http://sumo.dlr.de/xsd/routes_file.xsd">
> <vType id="normal car" vClass="passenger" maxSpeed="40"
> speedFactor="0.9" speedDev="0.2" sigma="0.5" color="1,0,0"/>
> *<flow id="normal" type="normal car" begin="0" probability="0.2"
> from="0/0to1/0" to="1/2to2/2"/>*
> </routes>
>
> After a car is inserted on network, how it makes a decision for which
> edge/lane it should take in order to get the destination?
>
> I read about weights, routing and randomness but nothing were clear enough.
>
> Thanks.
>
> --
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--
Pedro J. Matuck

"The hardest battle lies within."

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