This is the exit you need from the big roundabout.
As you can see, it's clearly labled as the cycle route to Loon Plage which is where the cycle routes for all directions start
This is the exit AFTER the one all the lorries will be taking, so it means you will be crossing their path.
The drivers of all vehicles have been cooped up on board for the last few hours, so all all firing up the deisel for a long motorway run.
Quite frankly, although it's a big roundabout, it may be less stressful if you walk around