I am here. East of Dürerhelling it is signed no access, except 6h-11h, except permit, wonerf, one way (eastward) except bicycles (BE:C3,[uitgezonderd van 06u00 tot 11u00][uitgezonderd vergunninghouders];F12a and BE:F19,M2) . West of Dürerhelling there are no access routes for vehicles. I believe Zeedijk-Wenduine is the same, but I've only observed the signs at Rocherhelling and Floorhelling.