S-574c
Ten-kilometer post on conventional or multilane road on an international route
Indicates the kilometer point, when it is a multiple of ten, on a conventional road or multilane road belonging to an international route, whose identification appears at the top of the sign.
Category: Location signs
Source: General Traffic Regulations (RD 1428/2003), Annex I; designs per the official sign catalog (RD 465/2025)