| Re: [sumo-user] Car routing |
Hi, yes they are enough. The difference is, that the number you choose is an upper limit to the random factor which is multiplied to the measured travel time. SUMO chooses for every edge a new random number r and multiplies it with the time t, so if r is much larger than t it will dominate the value used for routing. Best regards, Michael Am 08.03.2018 um 14:36 schrieb Pedro Matuck: > Jakob, > > Grateful with the support so far. :) > > these two parameters are enought to guarantee that all cars will have > the reroute devices and the "edges choice" will be randomly? > > <routing> > <weights.random-factor value="10"/> > <device.rerouting.probability value="1.0"/> > </routing> > > Another question... I didn't understand the parameter for > weights.random-factor. What is the difference if I set '10' or '1000'? > > Thank you. > > 2018-03-08 4:37 GMT-03:00 Jakob Erdmann <namdre.sumo@xxxxxxxxxxxxxx > <mailto:namdre.sumo@xxxxxxxxxxxxxx>>: > > you can get stochasticity into the routing decisions by setting the > option --weights.randomFactor. > If you make that value large you should be able to elicit aribtrary > turns. The option only takes effect when vehicles are equipped with > a rerouting device and perform periodic rerouting. See > http://sumo.dlr.de/wiki/Demand/Automatic_Routing > <http://sumo.dlr.de/wiki/Demand/Automatic_Routing> > > 2018-03-08 0:01 GMT+01:00 Pedro Matuck <pjmatuck@xxxxxxxxx > <mailto:pjmatuck@xxxxxxxxx>>: > > Jakob, > > there're any option where I can set the cars to choose the route > based on a stochastic way (or randomly)? (Example: As soon as it > reach some junction, the car could pick any way.) > > I can't assume that cars knows all the network status. > > Thanks > > 2018-03-02 3:41 GMT-03:00 Jakob Erdmann > <namdre.sumo@xxxxxxxxxxxxxx <mailto:namdre.sumo@xxxxxxxxxxxxxx>>: > > Yes. > - you can change the algorithm using option > --routing.algorithm > (http://sumo.dlr.de/wiki/Simulation/Routing#Routing_Algorithms > <http://sumo.dlr.de/wiki/Simulation/Routing#Routing_Algorithms>) > - you can change the assumed travel time values for each > edge to affect the choice of fastest route > (http://sumo.dlr.de/wiki/Simulation/Routing#Travel-time_values_for_routing > <http://sumo.dlr.de/wiki/Simulation/Routing#Travel-time_values_for_routing>) > > - you can set another objective function (i.e. routing to > minimize CO2 emissions) > (http://sumo.dlr.de/wiki/Simulation/Routing#Routing_by_effort <http://sumo.dlr.de/wiki/Simulation/Routing#Routing_by_effort>) > > regards, > Jakob > > 2018-03-02 0:11 GMT+01:00 Pedro Matuck <pjmatuck@xxxxxxxxx > <mailto:pjmatuck@xxxxxxxxx>>: > > Hi Jakon, > > is it possible to change the algorithm used by cars to > find the destination path? > > Thanks. > > 2018-02-09 7:50 GMT-02:00 Jakob Erdmann > <namdre.sumo@xxxxxxxxxxxxxx > <mailto:namdre.sumo@xxxxxxxxxxxxxx>>: > > It may be helpful to read this documentation for a > comprehensive explanation of the different routing > and rerouting facilities: > http://sumo.dlr.de/wiki/Simulation/Routing > <http://sumo.dlr.de/wiki/Simulation/Routing> > > 2018-01-16 21:40 GMT+01:00 Michael Behrisch > <oss@xxxxxxxxxxx <mailto:oss@xxxxxxxxxxx>>: > > Hi Pedro, > if you are using TraCI then you can set the > weight (traveltime) for the > edge directly > http://sumo.dlr.de/pydoc/traci._edge.html#EdgeDomain-adaptTraveltime > <http://sumo.dlr.de/pydoc/traci._edge.html#EdgeDomain-adaptTraveltime> > but > then you would also need to trigger the > rerouting via TraCI. But if you > need to run a lot of simulations (as you > probably will when doing ML) > you might not wish to use TraCI because it slows > down the simulation > considerably. > > Best regards > Michael > > Am 16.01.2018 um 15:32 schrieb Pedro Matuck: > > Hi Michael, > > > > I believe that you answered my question unintentionally. > > > > In summary the cars will always looking for the fastast way, correct? > > So, everything that affect this will change the car decision: > > Traffic Jam > > Lane Max Speed > > Edge Length > > > > There're anything else that I could change via TraCi to affect this > > situation? > > > > For my pourposes, the car sensitiveness is helpful because I don't need > > to worry with them, just change the network status in order to increase > > the number of arrived cars. The Machine Learn should learn the best > > situation by itself, considering all variables. However, in order the > > accelerate the learning process, I can use some heuristics to help the > > ML choose better actions faster. > > > > Thank you again. > > > > > > 2018-01-16 4:15 GMT-02:00 Michael Behrisch <oss@xxxxxxxxxxx <mailto:oss@xxxxxxxxxxx> > > <mailto:oss@xxxxxxxxxxx > <mailto:oss@xxxxxxxxxxx>>>: > > > > Hi Pedro, > > yes the cars use Dijkstra. The grid may be > not the best network to test > > this because all the edges have the same > length and it is thus very > > sensitive already to small changes. > > > > Best regards, > > Michael > > > > Am 15.01.2018 um 15:52 schrieb Pedro Matuck: > > > 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 > <mailto:oss@xxxxxxxxxxx> <mailto:oss@xxxxxxxxxxx > <mailto:oss@xxxxxxxxxxx>> > > > <mailto:oss@xxxxxxxxxxx > <mailto:oss@xxxxxxxxxxx> <mailto:oss@xxxxxxxxxxx > <mailto: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 > <http://www.w3.org/2001/XMLSchema-instance> > > <http://www.w3.org/2001/XMLSchema-instance > <http://www.w3.org/2001/XMLSchema-instance>> > > > > <http://www.w3.org/2001/XMLSchema-instance > <http://www.w3.org/2001/XMLSchema-instance> > > <http://www.w3.org/2001/XMLSchema-instance > <http://www.w3.org/2001/XMLSchema-instance>>>" > > > > > > > xsi:noNamespaceSchemaLocation="http://sumo.dlr.de/xsd/routes_file.xsd > <http://sumo.dlr.de/xsd/routes_file.xsd> > <http://sumo.dlr.de/xsd/routes_file.xsd > <http://sumo.dlr.de/xsd/routes_file.xsd>> > > > > <http://sumo.dlr.de/xsd/routes_file.xsd > <http://sumo.dlr.de/xsd/routes_file.xsd> > > <http://sumo.dlr.de/xsd/routes_file.xsd > <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. > > > > > > > > -- > > > > */Pedro J. Matuck/* > > > > Github > <https://github.com/pjmatuck> - Linkedin > > > > > <https://www.linkedin.com/in/pedro-matuck-79324323 > <https://www.linkedin.com/in/pedro-matuck-79324323> > > > <https://www.linkedin.com/in/pedro-matuck-79324323 > <https://www.linkedin.com/in/pedro-matuck-79324323>> > > > > <https://www.linkedin.com/in/pedro-matuck-79324323 > <https://www.linkedin.com/in/pedro-matuck-79324323> > > > <https://www.linkedin.com/in/pedro-matuck-79324323 > <https://www.linkedin.com/in/pedro-matuck-79324323>>>> - Youtube > > > > > <http://www.youtube.com/c/AbreChaves > <http://www.youtube.com/c/AbreChaves> > > <http://www.youtube.com/c/AbreChaves > <http://www.youtube.com/c/AbreChaves>> > > > <http://www.youtube.com/c/AbreChaves > <http://www.youtube.com/c/AbreChaves> > > <http://www.youtube.com/c/AbreChaves > <http://www.youtube.com/c/AbreChaves>>>> > > > > > > > > "The hardest battle lies within." > > > > > > > > > > > > > _______________________________________________ > > > > sumo-user mailing list > > > > sumo-user@xxxxxxxxxxx > <mailto:sumo-user@xxxxxxxxxxx> > <mailto:sumo-user@xxxxxxxxxxx > <mailto:sumo-user@xxxxxxxxxxx>> > > <mailto:sumo-user@xxxxxxxxxxx > <mailto:sumo-user@xxxxxxxxxxx> > <mailto:sumo-user@xxxxxxxxxxx > <mailto:sumo-user@xxxxxxxxxxx>>> > > > > To change your delivery options, retrieve your password, or > > > unsubscribe from this list, visit > > > > https://dev.eclipse.org/mailman/listinfo/sumo-user > <https://dev.eclipse.org/mailman/listinfo/sumo-user> > > <https://dev.eclipse.org/mailman/listinfo/sumo-user > <https://dev.eclipse.org/mailman/listinfo/sumo-user>> > > > <https://dev.eclipse.org/mailman/listinfo/sumo-user > <https://dev.eclipse.org/mailman/listinfo/sumo-user> > > <https://dev.eclipse.org/mailman/listinfo/sumo-user > <https://dev.eclipse.org/mailman/listinfo/sumo-user>>> > > > > > > > > > > > > > > > > > > > > > > -- > > > */Pedro J. Matuck/* > > > Github <https://github.com/pjmatuck> - Linkedin > > > <https://www.linkedin.com/in/pedro-matuck-79324323 <https://www.linkedin.com/in/pedro-matuck-79324323> > > <https://www.linkedin.com/in/pedro-matuck-79324323 <https://www.linkedin.com/in/pedro-matuck-79324323>>> - Youtube > > > <http://www.youtube.com/c/AbreChaves > <http://www.youtube.com/c/AbreChaves> > > <http://www.youtube.com/c/AbreChaves > <http://www.youtube.com/c/AbreChaves>>> > > > > > > "The hardest battle lies within." > > > > > > > > > > > > -- > > */Pedro J. Matuck/* > > Github <https://github.com/pjmatuck> - Linkedin > > > <https://www.linkedin.com/in/pedro-matuck-79324323 > <https://www.linkedin.com/in/pedro-matuck-79324323>> - Youtube > > <http://www.youtube.com/c/AbreChaves > <http://www.youtube.com/c/AbreChaves>> > > > > "The hardest battle lies within." > > > > _______________________________________________ > sumo-user mailing list > sumo-user@xxxxxxxxxxx <mailto:sumo-user@xxxxxxxxxxx> > To change your delivery options, retrieve your > password, or unsubscribe from this list, visit > https://dev.eclipse.org/mailman/listinfo/sumo-user > <https://dev.eclipse.org/mailman/listinfo/sumo-user> > > > > > > -- > */Pedro J. Matuck/* > Github <https://github.com/pjmatuck> - Linkedin > <https://www.linkedin.com/in/pedro-matuck-79324323> - Youtube > <http://www.youtube.com/c/AbreChaves> > > "The hardest battle lies within." > > > > > > -- > */Pedro J. Matuck/* > Github <https://github.com/pjmatuck> - Linkedin > <https://www.linkedin.com/in/pedro-matuck-79324323> - Youtube > <http://www.youtube.com/c/AbreChaves> > > "The hardest battle lies within." > > > > > > -- > */Pedro J. Matuck/* > Github <https://github.com/pjmatuck> - Linkedin > <https://www.linkedin.com/in/pedro-matuck-79324323> - Youtube > <http://www.youtube.com/c/AbreChaves> > > "The hardest battle lies within." > > > _______________________________________________ > sumo-user mailing list > sumo-user@xxxxxxxxxxx > To change your delivery options, retrieve your password, or unsubscribe from this list, visit > https://dev.eclipse.org/mailman/listinfo/sumo-user >
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