Hi Jakob,

Thanks as always for your prompt reply. I'm still a new user of SUMO so I'm
afraid I don't understand the construction shown in
https://sumo.dlr.de/docs/Simulation/Motorways.html#combined_on-off-ramps
Is it two edges on the left, joined to one edge with 3 lanes in the middle,
then joined to two edges on the right? If the off-ramp is a separate edge,
NetEdit  doesn't allow lanes 0 and 1 of the middle edge to both target it.
(On the other hand single lanes are allowed to target multiple lanes
belonging to a single edge.) Any tips you could provide would be much
appreciated.

Thank you,
Albert Jeans

On Thu, Oct 3, 2019 at 11:22 AM Jakob Erdmann <[email protected]> wrote:

> 1) This sounds as if those vehicles prefer a particular lane for strategic
> reasons (to avoid mandatory lane-change later during their route)
> 2) vehicles in sumo also try to get into the correct lane as soon as
> possible. On short weaving sections they may not always manage to do so.
> You can fix this with the network modification described here:
> https://sumo.dlr.de/docs/Simulation/Motorways.html#combined_on-off-ramps
>
> regards,
> Jakob
>
> Am Do., 3. Okt. 2019 um 08:20 Uhr schrieb Albert Jeans <[email protected]
> >:
>
>> Hi,
>>
>> I have one lane making a turn into either of two lanes. However, when one
>> of the two destination lanes is filled with vehicles, the turning vehicle
>> does not always turn into the unoccupied lane but instead waits for the
>> full lane to clear. Does that mean vehicles cannot change lanes once
>> they've reached a junction?
>>
>> In the opposite situation, I have two single lanes merging together to
>> form a single two lane road which later splits again (left and right). In
>> real life,  drivers try to get into their proper lane as soon as possible
>> rather than go further down the road and try an cut into the queue. SUMO
>> often does the latter, and when that's difficult, that vehicle blocks
>> traffic behind it, or even ends up in the wrong lane and gets stuck.
>>
>> Can either of these two lane changing behaviors be modified by changing
>> some parameters?
>>
>> Thanks,
>> Albert Jeans
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