Correct answer
Yes.
Yes. S-3 reserves the road for motor vehicles in the Spanish automóvil category, which includes lorries; this sign alone sets no authorised-mass threshold. It does not merely exclude mopeds and special vehicles: users outside that category, such as cycles and pedestrians, may not use it either. Other applicable restrictions remain in force.
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Only if your lorry has a MAM below 3,500 kg.
No.
Yes.
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Sign S-3: a road reserved for motor vehicles
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