Who has an advance on a simultaneous ascent and departure?

I have a question, and I have to go through a place on the motorway every now and then, where an exit strip is also the acceleration strip of a driveway. Now I want to know who has the driveway here, because I think that the traffic that wants to leave must have the driveway. Attached is a picture and this shows the situation. In my opinion, the red car has the right to go into the departure and the blue car must grant the driveway. Josha