You could set the option --ramps.guess (on initial import or for
post-processing) and it will fix the geometry of the off-ramp so that it
aligns better with the main road (less overlap).
Note:
- this will only work if the geometry of the off-ramp is not too dense
(otherwise the adjacent geometry points will still look ugly)
- the option will only trigger if the motorway is recognized as such which
requires it to have a minimum speed of 79km/h (threshold adjustable with
option --ramps.min-highway-speed)

Otherwise, your best remedy is to fix things manually in netedit:
https://sumo.dlr.de/docs/Netedit/neteditUsageExamples.html#specifying_the_complete_geometry_of_an_edge_including_endpoints

regards,
Jakob

Am Mi., 27. Jan. 2021 um 19:05 Uhr schrieb Michael <
[email protected]>:

> Hi,
>
> I have some questions about using shapfiles to generate a simulation
> network.
>
> Currently I have a shapefile containing a highway network with x,y,z
> coordinates in a known reference system as well as attributes for
> lanenumbers and posted speeds.
> My main problem at this stage is for netconvert to correctly generate
> on/off-ramps.
>
> As an example I have the following piece of road.
>
> <http://sumo-user-mailing-list.90755.n8.nabble.com/file/t278/img.jpg>
>
> Which in my shapefile looks like (with labels for the number of lanes):
> <http://sumo-user-mailing-list.90755.n8.nabble.com/file/t278/img2.jpg>
>
> However when I run netconvert the same section looks like this in Netedit
> (after computing junctions):
> <http://sumo-user-mailing-list.90755.n8.nabble.com/file/t278/img3.jpg>
>
> Is there a good method to processing the network in my GIS editor before
> passing it to Netconvert in order for on/off-ramps to be computed
> correctly?
>
> Kind regards and grateful for any assistance,
> Michael
>
>
>
> --
> Sent from: http://sumo-user-mailing-list.90755.n8.nabble.com/
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