- netgenerate has an explicit  --turn-lanes option
- you could plausibly define an xml input file with split definitions in an
automated manner:
https://sumo.dlr.de/docs/Networks/PlainXML.html#road_segment_refining

Am Di., 23. Juni 2020 um 01:30 Uhr schrieb Hao Zhou <[email protected]>:

> Dear SUMO community,
>
> Do we have efficient ways to add a dedicated left-turn lane before
> intersections. I did some search, it looks like we can do it manually in
> NETEDIT, by splitting the edge at some point and separate it into more
> lanes. I'm wondering, since it is a very common intersection setting, does
> there exist more efficient ways to generate them for all intersections at
> once? And can we write a script to edit the net file, instead of manually
> change the geometry in NETEDIT?
>
> Best regards,
>
> Hao Zhou,
> Georgia Tech
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