Hi, Thank you very much for the reply. I used a 'zipper' node and got to a situation which I expected to get. I will try with
On Mon, Feb 12, 2018 at 10:05 PM, Jakob Erdmann <namdre.s...@googlemail.com> wrote: > Hello, > sumo has two distinct interpretations of what it means when the number of > lanes changes from on edge to the next > 1) an on-ramp type of situation where the ending lane is subordinate to > the continuing lane and is only used to accelerate (the default). In this > case vehicles try to leave the ending lane as soon as possible. The > distance to the lane end where vehicles attempt to leave the merging lane > can be configured with the lane-change model parameter lcStrategic. (see > http://sumo.dlr.de/wiki/Definition_of_Vehicles,_Vehicle_Types,_and_Routes# > Lane-Changing_Models). Note, that the models treat the case where the > rightmost lane ends slightly different from the case where the leftmost > lane ends but by default vehicles try to avoid staying on the ending lane. > > 2) a zipper type situation where both lanes are to be used until the > merging point and vehicles interleave. This case is configured by setting > the node where both edges meet to type 'zipper' > > regards, > Jakob > > 2018-02-02 5:23 GMT+01:00 Alan Dee <adandee.s...@gmail.com>: > >> Hello Michael , >> >> In this scenario, vehicles change the lane in a strange way. Vehicles on >> the lane 0 (which is going be be merged) change the lane halfway through >> the lane and the vehicles do not run until they reach the merging point on >> that road. In other words, second 50% (around) of space on that lane is >> unoccupied since the vehicles change the lane at the end of the first 50% >> (around) of the lane. >> >> I changed the lane changing model to the older one DK2008. Then this >> problem was reduced to a fair level (at least vehicles on that lane waited >> until they pass around 75%). But it creates unnecessary congestion at the >> end of the other lane. Time to time 5,6 vehicles unusually wait there even >> though there is enough space ahead of them. >> >> I am confused that whether it is a problem with SUMO lane changing >> models. I appreciate any suggestions. >> >> Thank you >> >> >> >> On Wed, Jan 24, 2018 at 2:44 PM, Alan Dee <adandee.s...@gmail.com> wrote: >> >>> Thanks a lot Michael. I will check on it. >>> Regards. >>> >>> On Tue, Jan 23, 2018 at 8:24 PM, Michael Behrisch <o...@behrisch.de> >>> wrote: >>> >>>> Hi Dee, >>>> I'm afraid you cannot ghave that automatically, you will need to move >>>> and connect the lane manually in netedit. If moving the single lane to the >>>> center already helps, you can set the spreadtype attribute instead of >>>> moving maually but you will still need to set the connection. >>>> >>>> Best regards >>>> Michael >>>> >>>> >>>> Am 2018-01-22 23:22, schrieb Alan Dee: >>>> >>>>> Hi Michael, >>>>> >>>>> Thank you very much for the reply. Now I understand the reason why the >>>>> vehicles disappear. >>>>> I did as you mentioned, and it works fine. But I have another question >>>>> now. >>>>> >>>>> What I did was add basically adding two edges. First edge contains two >>>>> lanes ( index 0, 1). Then at the node with which that edge ends the >>>>> next >>>>> edge with a single lane (index 0) begins ( Please correct me if this >>>>> is not >>>>> what you advised). >>>>> >>>>> Once the network is built, the default behavior is, physically lane 1 >>>>> of >>>>> the first edge is straightly linked with lane 0, and lane 0 of the >>>>> first >>>>> edge is merged and ended at the node. Can I change this behavior to >>>>> have >>>>> this in other way around (i.e. lane 0 of the first edge is straightly >>>>> linked with lane 0, and lane 1 of the first edge is merged and ended >>>>> at the >>>>> node) ? >>>>> >>>>> I know that vehicle flow can be changed by altering the connections. I >>>>> am >>>>> asking to change both geometry and vehicle flow together. >>>>> >>>>> Thanks, >>>>> Dee. >>>>> >>>>> >>>>> On Tue, Jan 23, 2018 at 7:05 AM, Michael Behrisch <o...@behrisch.de> >>>>> wrote: >>>>> >>>>> Hi Dee, >>>>>> you need to define a new edge when the number of lanes changes (or let >>>>>> SUMO's netconvert do this, this is essentially what the split does). >>>>>> Currently it is not possible for the lanes of the same edge to have >>>>>> different lengths. The reason why the vehicles disappeared is that the >>>>>> edge after the split has a new name and probably did not occur in your >>>>>> route. >>>>>> >>>>>> Best regards, >>>>>> Michael >>>>>> >>>>>> Am 22.01.2018 um 06:29 schrieb Alan Dee: >>>>>> > Hello, >>>>>> > >>>>>> > I have a simple networks in which I need to do a merging lanes. >>>>>> > >>>>>> > There is a single edge, let say its length is 1000m. >>>>>> > At 500m from the beginning, one lane should be merged with the >>>>>> other. >>>>>> > >>>>>> > I have tried the both following ways. >>>>>> > >>>>>> > 1. I tried setting a length of one lane to 500m, and the lane ends >>>>>> with >>>>>> > a clear cut at the defined point. Can this be considered as a >>>>>> merge? >>>>>> > 2. I tried the refining roads in sumo documentation >>>>>> > <http://sumo.dlr.de/wiki/Networks/Building_Networks_ >>>>>> from_own_XML-descriptions#Road_Segment_Refining>, >>>>>> > but after the split point, the vehicles disappear from both >>>>>> lanes. I >>>>>> > am confused about what is happening. >>>>>> > >>>>>> > I am quite new to sumo and perhaps this might not be the correct >>>>>> way to >>>>>> > do this. I did find a solution though I went through the >>>>>> documentation. >>>>>> > I would appreciate if some can provide me an insight on this. >>>>>> > >>>>>> > Regards, >>>>>> > Dee. >>>>>> > >>>>>> > >>>>>> > _______________________________________________ >>>>>> > sumo-user mailing list >>>>>> > sumo-user@eclipse.org >>>>>> > To change your delivery options, retrieve your password, or >>>>>> unsubscribe >>>>>> from this list, visit >>>>>> > https://dev.eclipse.org/mailman/listinfo/sumo-user >>>>>> > >>>>>> >>>>>> >>>>>> >>>>>> >>> >> >> _______________________________________________ >> sumo-user mailing list >> sumo-user@eclipse.org >> To change your delivery options, retrieve your password, or unsubscribe >> from this list, visit >> https://dev.eclipse.org/mailman/listinfo/sumo-user >> >> > > _______________________________________________ > sumo-user mailing list > sumo-user@eclipse.org > 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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