It looks like the roundabout calls for four separate entrances, one each from the three state roads and a fourth from the property just below the Weirs Channel Bridge that is currently home to Donna Jean's Diner.
If that is the case then the Bridge side entrance and the Diner entrance look very close to each other.
Below are images before the roundabout and the drawing of the plan for it.
It appears that Donna Jean's Diner will have an entrance as the plan shows:
