wrong routing – tose roads are not allowed to use

BMW navigation is using this road when guiding from Ulm to Dornstadt.
This road and the ones on the opposite are not allowed to enter and it is not selten that the cars end up on A8 to Stuttgart where the next return possibility is in 20km

Hello,
I don´t know why some navigational devices use these ramp links for routing. That´s really strange.
When you check the “vehicular access” in Map Creator you see that the mentioned links which are part of the ramps south and north of the highway are only allowed for emergency vehicles.
I don´t know the history of the ramps. Maybe the characteristics have changed a while ago and in the past it was drivable for more than only emergencies and some systems still use old map data.
Nevertheless, the current coding of the mentioned ramps is correct.

Thanks and best regards
Eric