danieldegroot2
Ah, didn't spot it first time around due to some construction fencing. I've now also found there's signs NL:C12 + NL:OB(uitgezonderd ontheffingshouders) along the length of the Malledijk. From what I have seen, I'd have to assume it starts just before the bridge.

I suggest the following;

On the Malledijk east of Wattweg, to just east of the bridge;
motor_vehicle=destination
moped=yes
mofa=yes
bicycle=yes

("destination" because we don't seem to have a tag for this exception.)
("bicycle" is optional, but is useful to know. The road is not signed as cycleway, so it will remain an unclassified.)

On the bridge also
hgv=no