Where should the splitting of the motorway begin:
1. Current place?
2. or place of physical separation with 3 lanes before and destination:lanes tags?

Es gibt keinen Bindestrich auf dem Schild hier. Auf dem Schild gibt's nur:
"Feldkirch
Frastanz"

sollte man den Bindestrich entfernen?

There are 2 speed cameras here (both on the river side) measuring both directions. Source: survey

There are 2 new parkings here. I have added them, but exact position and driveways should be made

Sind die Nummer 17 und 19 richtig angezeichnet? (laut basemap.at)

Check beginning of the culvert