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 >
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