Italian road sign: begin of a road where motor vehicles must use winter tyres or carry snow chains. Motorcycles (including two-wheeled moped) are not required to use winter tyres or carry snow chains but can't drive with ice or snow condition. The last plate of the sign carries information about the road stretch where winter tyres need to be used (or snow chains must be carried). Sign meant to be used inside urban areas.  Introduced by directive n. 1580 of 2013.
Direttiva Ministero delle Infrastrutture e dei Trasporti n. 1580 del 16/01/2013 Direttiva sulla circolazione stradale in periodo invernale e in caso di emergenza neve
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