A simple red sign saying "RW 19 threshold NEXT RIGHT". Our French Cousins write such signs on the taxiway itself, just like road markings. When I first saw these at CDG (Paris) I thought they were great. Not only that but fairly idiot proof and cheap. I'll even lend you a paint brush.
Thanks.
The pavement at the entrance of D is painted with the sign MAX TOW 56 000KG (or something fairly similar) but that hasn't worked either, and nor is it visible at night. The red sign sounds good.