Hi,
I did not left the highway to check but nothing could stop me from leaving the highway and on the map the road (Avenue du Fort orbeau) isn’t finished apparantly. For me this is an error.
I have a printscreen of the exact location if needed because difficilt to situate.
Congratulations with your first post in the forums and welcome!
Can you give a permalink of the place so I don’t need to search the map 
If you don’t know how to make a permalink, check this: https://wiki.waze.com/wiki/Permalink#Permalink
If I understand you, the segment “roadwork” can be connected to the ramp?
Ok like this?
sorry for the late answer but it’s apparently done now