Jakob, Thanks for your reply! Based on your reply I read the document to find a way to generate rou.xml from trips.xml ( https://sumo.dlr.de/docs/duarouter.html). The document suggests to use the duarouter.exe to do what I want, and I also found tools ( https://sumo.dlr.de/docs/Tools/Assign.html ) can also be used as alternative methods to generate rou.xml.
Then, I have a little confusion about the relationship between *duarouter.exe*, *dua-iterate.py* and *on-shot.py*。 *1) the relationship between duarouter.exe and dua-Iterate.py* The relationship in my understanding is illustrated below: [image: image.png] Assume the simulation begin--time is 0 and end-time is 3600. Duarouter.exe will use the travel time of each edge (free-flow speed) as the effort or weight in the shortest route algorithm to generate pre-defined routes for vehicles before begin-time=0, and routes would not be updated during the simulation period(=3600s)。Actual trave time of edges would be generated as the results. When calling dua-iterate.py, duarouter.exe will run as the sub-function to generate the actual travel time of each edge, and next iteration of dua-Iterate.py will run shortest route algorithm using the generated travel time. 2) the relationship between *dua-Iterate.py and one-shot.py* The travel time of each edge is updated* after simulation* in dua-Iterate.py，but updated* in simulation* in each given travel-time updating interval in one-shot.py as shown below [image: image.png] Appreciated your help to correct my wrong understanding and looking forward to your reply. Best, Jane On Wed, Sep 2, 2020 at 2:29 PM Jane Cheung <[email protected]> wrote: > Dear all, > I have defined the configuration in .sumocfg as below: > > > <routing> > <device.rerouting.probability value="*-1*"/> > <device.rerouting.period value="300"/> > <device.rerouting.pre-period value="300"/> > </routing> > > *(1)* > my question is > "-1'' means no vehicles in my simulation could change their route > after departing? Does it mean the other two commands are useless with > <device.rerouting?probability value="*-1*"/> ? > If I set the <device.rerouting.probability value="*1*"/>, all the > vehicles could change their route to the faster in every 300s? > > *(2)* > If my simuation duration is 3600s(1h) and I set the > <device.rerouting.probability value="*1*"/>, > <device.rerouting.period value="75000000000000000"/> > <device.rerouting.pre-period value=" 75000000000000000 > "/> > all the vehicles can change to the fastest route and *would not* change > to the fastest one in my simulation as I had set the rerouting period is > 75000000000000000? And vehicles *could* change to the fastest route when > currenttime* = 75000000000000001* if I had set the <end valute= > "75000000000000001">? > > > *(3) * > if my simulation period is 3600, and the pre-period rerouting value was > set to <device.rerouting.pre-period value="300"/> > <device.rerouting.period value="75000000000000000"/> > all the vehicles will be loaded in my simulation would check the fastest > route for themself every 300s before departure? The lastest fastest route > of one vehicle will be chosen as its route during the whole simulation and > would not change their route during the simulation as I set the > <device.rerouting.period value="75000000000000000"/> ? > > > *(4) * > if I set the rerouting command as > <routing> > <device.rerouting.probability value="*1*"/> > <device.rerouting.period value="300"/> > <device.rerouting.pre-period value="300"/> > </routing> > > What‘s the difference betwwen using *<route-files > value="cross0.trips.xml"/> (1.sumocfg)*and <route-files value="cross0. > *route*.xml"/>( *2.sumocfg *) > > the mean travel time in 1.sumocfg is shorter than 2.sumocfg. > So, why mean travel time is shorter in 1.sumocfg? how do vehicles in > *1.sumocfg > decide the route? *And which route one vehicle would choose before it is > going to depart? > > > Best regard, > > Jane Cheung > > >
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