https://github.com/eclipse/sumo/blob/1fd856dfd8db8d6379215a4be06579b7c3cffdc8/src/microsim/devices/MSRoutingEngine.cpp#L179-L181
Am Di., 8. Sept. 2020 um 05:40 Uhr schrieb Jane Cheung < [email protected]>: > Jakob, > thanks for your reply. > As described in the document, the function of -*-weights.random-factor > FLOAT* is " Edge weights for routing are dynamically disturbed by a > random factor drawn uniformly from [1,FLOAT)" > Where could I find some mathematical formulation or the function describe > the dynamically disturbed process? > > > Best regards， > > Jane > > > > On Mon, Sep 7, 2020 at 6:27 PM Jakob Erdmann <[email protected]> > wrote: > >> 1) "normal" vehicle was meant in contrast to trips (which already imply >> some routing) >> 2) random roll of the dice (unrelated to traffic situation). Think of >> this as the set of vehicles equipped with a live-traffic route finding >> software >> 3) option --verbose >> 4) it depends. We often use 300s in our projects >> 5) duarouter -r trips.xml -o routes.xml --weights.random-factor FLOAT >> 6) The "current traffic condition" is an average over past traffic states >> as explained at https://sumo.dlr.de/docs/Demand/Automatic_Routing.html. >> No equilibrium iteration is done for this. >> >> Am Fr., 4. Sept. 2020 um 05:54 Uhr schrieb Jane Cheung < >> [email protected]>: >> >>> Jakob, >>> >>> Thanks for your reply. >>> >>> More questions about the previous email. >>> >>> 1) the probability could be set in the range of (0,1], and <00 value >>> means *normal vehicles* will not perform rerouting. >>> >>> - What kind of vehicle is not the *normal vehicle*? The the only >>> scenario I know is to use Traci to reroute in the simulation. >>> - If I set <device.rerouting.probability value="*0.5*"/> and the s >>> log.txt is printed as below: >>> >>> >>> >>> Performance: >>> >>> Duration: 297822ms >>> >>> Real time factor: 18.1316 >>> >>> UPS: 32080.783152 >>> >>> Vehicles: >>> >>> * Inserted: 14158 (Loaded: 17538)* >>> >>> * Running: 2061* >>> >>> * Waiting: 3356* >>> >>> >>> >>> Does it mean SUMO would choose 50% of *vehicles* to have the ability of >>> rerouting? >>> >>> - The *vehicles* are in terms of the *inserted vehicles(14158)* or >>> the *loaded ones(17538)*？ >>> - How does SUMO *decide which vehicle* can reroute? >>> >>> >>> - For example, edge A1B1 and edge B1A1 are *100m*, the number of >>> vehicles on edgeA1B1 is *18*(edge *A1B1* most in congestion), the >>> number of vehicles on edge *B1A1 is 6*. The Sumo would choose 10 >>> vehicles among 20 vehicles on edge A1B1 and 3 vehicles among 6 vehicles >>> on >>> edgeB1A1. Is that right? Obviously, traffic conditions in the two edges >>> are >>> different. Edge A1B1 is mostly in congestion, and vehicles on edge B1A1 >>> can >>> run in free-flow speed. More rerouting devices are assigned to vehicles >>> on >>> edge A1B1 might be a better choice. Could SUMO assign rerouting devices >>> like that, or SUMO uses other more realistic strategies to choose which >>> vehicle can reroute? >>> - As explained in >>> https://sumo.dlr.de/docs/Simulation/Output.html#timing_data >>> - How to let output printed the total time spend routing and average >>> time per routing call? >>> - According to your experience, the suitable frequency of calling >>> rerouting is? >>> >>> >>> >>> >>> >>> 2) as you explained *in 2),* “all vehicles <route-files >>> value="casemy.trips.xml"/>when entering the simulation (pre-insertion >>> rerouting uses the departure as the first routing time) but no further >>> rerouting takes place due to the high period.” >>> >>> In my understanding, >>> >>> - if I use the *trips <route-files value="casemy.trips.xml"/> *in >>> *.sumocfg* file, the “*reroute once*” means *route* or generating >>> the route file firstly for inserted vehicles to let vehicles know >>> edges >>> they are scheduled to drive, and then, during the simulation the inserted >>> vehicle will not reroute due to the high period; >>> - if I have the *trips file*, how could I generate the *route file >>> *randomly? >>> >>> - if I use the routes *<route-files value="casemy.rou.xml"/>* in >>> *.sumocfg* file, the “*reroute once*” means *reroute. *In other >>> words, ， SUMO will assign the fastest routes to all inserted >>> vehicles according to the traffic condition at the inserted time point of >>> vehicles. >>> - Which algorithm does SUMO use to find the fastest routes when >>> vehicles are going to enter into the simulation? The user equilibrium >>> model, such as call *duarouter.exe* run in 50 interaction or other >>> ones? >>> >>> >>> Appreciated in advance! >>> >>> Best regards, >>> >>> Jane Cheung >>> >>> _______________________________________________ >>> sumo-user mailing list >>> [email protected] >>> To unsubscribe from this list, visit >>> https://www.eclipse.org/mailman/listinfo/sumo-user >>> >> _______________________________________________ >> sumo-user mailing list >> [email protected] >> To unsubscribe from this list, visit >> https://www.eclipse.org/mailman/listinfo/sumo-user >> > _______________________________________________ > sumo-user mailing list > [email protected] > To unsubscribe from this list, visit > https://www.eclipse.org/mailman/listinfo/sumo-user >
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