S-992c
Minimum distance between vehicles on autopista or autovía
Indicates, on a section of an autopista or autovía where rear-end collisions are frequent, the number of chevron road markings a vehicle must leave between itself and the vehicle ahead.
Category: Other signs
Source: General Traffic Regulations (RD 1428/2003), Annex I; designs per the official sign catalog (RD 465/2025)