Hello,

Pardon my asking but according to Belgian law, the standard sign for school streets is a C3 road sign, which forbids every vehicle.  Vehicles that aren’t motor vehicles—the most prominent category being bicycles—may not pass through.  This is the reason why we commonly use "vehicle:conditional" for school streets.

Unless of course an M2 sign is placed under the C3 sign.

What did your survey show?