| Re: [sumo-dev] latAlignment: what is the difference between compact, nice, and arbitrary? |
On Tue, 25 Sep 2018 13:45:49 +0200
Jakob Erdmann <namdre.sumo@xxxxxxxxx> wrote:
> My first guess is that this is roundabout related.
> Can you check
> a) whether this only occurs near roundabouts?
No, it happens near other intersections too (see align.center.intersection.png)
> b) whether the issue disappars when setting lcCooperative=0 for all
> vehicles?
No, lcCooperative set to 0 does not change this behavior.
> regards,
> Jakob
>
One thing that I noticed, tho, is that this happen more frequently if the street is composed by 1
edge only (there is no other direction).
Thanks,
Lara
> 2018-09-25 13:20 GMT+02:00 Lara CODECA <lara.codeca@xxxxxxxxxx>:
>
> > Hello Jakob,
> >
> > all the vehicles in the screenshot are latAlignment="center" and only the
> > motorbikes are
> > latAlignent="arbitrary". Given the 2 lanes, I was expecting the vehicles
> > to queue on both lanes,
> > and not in the middle. Is this normal?
> >
> > For the records, of I use a simple "highway" scenario, all works fine.
> >
> > Cheers,
> > Lara
> >
> > On Thu, 20 Sep 2018 12:25:11 +0200
> > Jakob Erdmann <namdre.sumo@xxxxxxxxx> wrote:
> >
> > > When using default lane-width (3.2m), vehicle widths (1.8m) and
> > motorcyle
> > > width (0.8m)
> > > It should suffice to give vehicles latAlignment="center" and use
> > > latAlignent="arbitrary" for motorcycles.
> > > The big advantage of this scheme is to avoid the need for
> > > custom-location-specific alignment (you may have to set a lower minGapLat
> > > for motorcycles though).
> > >
> > > There may be cases where the motorcycles wait in parallel and block other
> > > vehicles.
> > > A solution for that would be to invent a new alignment "between" that
> > would
> > > make them drive on the lane marking between lanes (with epsilon to one
> > side
> > > to avoid numerical instability in determining the primary lane), whenever
> > > there is more than one lane.
> > >
> > > There is actually a parameter that does location specific alignment
> > > (lcTurnAlignmentDistance) which makes vehicles alight left before turning
> > > left and right before turning right) but this is still done in a generic
> > > manner which does not require extra network attributes.
> > >
> > > regards,
> > > Jakob
> > >
> > >
> > > 2018-09-20 12:18 GMT+02:00 Laura Bieker <bieker.laura@xxxxxxxxx>:
> > >
> > > > Hello Lara,
> > > >
> > > > if you need this behaviour only on a vehicle base you can use the
> > > > Bluelight- Device ( http://sumo.dlr.de/wiki/SUMO#Bluelight_Device )*.*
> > > >
> > > > If you enable --device.bluelight.explicit *vehicleID *for this vehicle
> > > > the surrounding traffic is formatting a virtuall middle lane to let the
> > > > vehicle pass.
> > > > But after it has passed the vehicles drive with their old alignment.
> > > >
> > > > Best regards,
> > > > Laura
> > > >
> > > > Am Do., 20. Sep. 2018 um 12:03 Uhr schrieb Lara CODECA <
> > > > lara.codeca@xxxxxxxxxx>:
> > > >
> > > >> Hello Jakob,
> > > >>
> > > >> sorry for the wrong mailing list.
> > > >>
> > > >> I need to implement middle virtual lanes for motorbikes.
> > > >> For example, in a 2 lanes road, the alignment on the rightmost lane is
> > > >> right and on the leftmost
> > > >> lane is left.
> > > >> This should create a space in the middle, and I want to see if small
> > > >> vehicle can use
> > > >> this to alleviate traffic congestion. Obviously I need to find a way
> > for
> > > >> motorbikes to overtake
> > > >> both left and right..
> > > >> Maybe something similar is already done to enable blue-light vehicles
> > to
> > > >> cross intersections..
> > > >>
> > > >> Alternatively, would it be possible to force an alignment on a
> > lane-base
> > > >> / vehicle-base?
> > > >>
> > > >> ---- >>>>>>>>>>>> ---- direction
> > > >> | center alignment |
> > > >> ------------------------
> > > >> | left alignment |
> > > >> ------------------------
> > > >> | right alignment |
> > > >> ------------------------
> > > >>
> > > >> In this case, if every vehicle has to respect this paradigm but
> > > >> motorbikes are free, I can devine
> > > >> places where the "virtual lane" is implemented.
> > > >>
> > > >> Thanks in advance,
> > > >> Lara
> > > >>
> > > >> On Thu, 20 Sep 2018 11:26:08 +0200
> > > >> Jakob Erdmann <namdre.sumo@xxxxxxxxx> wrote:
> > > >>
> > > >> > I'm taking this to the developer list because it's probably to
> > technical
> > > >> > for most users.
> > > >> > A good starting point is src/microsim/lcmodels/MSLCM_SL2015.cpp
> > lines
> > > >> > 1683-1702
> > > >> > The switch uses pre-computed values from above but you should be
> > able to
> > > >> > use these variables as breadcrumbs to find your way around.
> > > >> > If you can describe the envisioned behavior I may have ideas on
> > where to
> > > >> > best merge them with the existing code.
> > > >> >
> > > >> > regards,
> > > >> > Jakob
> > > >> >
> > > >> > 2018-09-20 11:06 GMT+02:00 Lara CODECA <lara.codeca@xxxxxxxxxx>:
> > > >> >
> > > >> > > Hello again,
> > > >> > >
> > > >> > > if I need to implement an additional behavior, how should I do it?
> > > >> > > Can I have some pointer to start digging in the SUMO code?
> > > >> > >
> > > >> > > Regards,
> > > >> > > Lara
> > > >> > >
> > > >> > > On Mon, 17 Sep 2018 16:31:41 +0200
> > > >> > > Jakob Erdmann <namdre.sumo@xxxxxxxxx> wrote:
> > > >> > >
> > > >> > > > Hello,
> > > >> > > > the alignments are now described at
> > > >> > > > http://sumo.dlr.de/wiki/Simulation/SublaneModel#Model_ Details
> > > >> > > > regards,
> > > >> > > > Jakob
> > > >> > > >
> > > >> > > > 2018-09-17 16:05 GMT+02:00 Lara CODECA <lara.codeca@xxxxxxxxxx
> > >:
> > > >> > > >
> > > >> > > > > Dear All,
> > > >> > > > >
> > > >> > > > > I'm working with the sublane model and I need an info.
> > > >> > > > >
> > > >> > > > > latAlignment: The preferred lateral alignment when using the
> > > >> > > > > sublane-model.
> > > >> > > > > One of (left, right, center, compact, nice,
> > > >> arbitrary).
> > > >> > > > > http://sumo.dlr.de/wiki/Definition_of_Vehicles,_
> > > >> > > Vehicle_Types,_and_Routes#
> > > >> > > > > Available_vType_Attributes
> > > >> > > > >
> > > >> > > > > Left, right, and center alignments are easy to guess.
> > > >> > > > > What is the difference between compact, nice, and arbitrary?
> > > >> > > > >
> > > >> > > > > Thanks in advance.
> > > >> > > > > Lara
> > > >> > > > >
> > > >> > > > > --
> > > >> > > > > Lara CODECA
> > > >> > > > > Postdoc
> > > >> > > > > Tel : 04.93.00.81.51
> > > >> > > > >
> > > >> > > > > EURECOM
> > > >> > > > > Campus SophiaTech
> > > >> > > > > http://www.eurecom.fr/
> > > >> > > > > _______________________________________________
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> > > >> > > > >
> > > >> > >
> > > >> > >
> > > >> > >
> > > >> > > --
> > > >> > > Lara CODECA
> > > >> > > Postdoc
> > > >> > > Tel : 04.93.00.81.51
> > > >> > >
> > > >> > > EURECOM
> > > >> > > Campus SophiaTech
> > > >> > > http://www.eurecom.fr/
> > > >> > >
> > > >>
> > > >>
> > > >>
> > > >> --
> > > >> Lara CODECA
> > > >> Postdoc
> > > >> Tel : 04.93.00.81.51
> > > >>
> > > >> EURECOM
> > > >> Campus SophiaTech
> > > >> http://www.eurecom.fr/
> > > >> _______________________________________________
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> > > >>
> > > >
> >
> >
> >
> > --
> > Lara CODECA
> > Postdoc
> > Tel : 04.93.00.81.51
> >
> > EURECOM
> > Campus SophiaTech
> > http://www.eurecom.fr/
> >
--
Lara CODECA
Postdoc
Tel : 04.93.00.81.51
EURECOM
Campus SophiaTech
http://www.eurecom.fr/