R-411
Minimum speed
Drivers must travel at least at the speed in kilometers per hour shown on the sign, from where it is placed until another minimum speed sign with a different value, or an end of minimum speed sign, or a maximum speed sign of equal or lower value.
Category: Mandatory signs
Source: General Traffic Regulations (RD 1428/2003), Annex I; designs per the official sign catalog (RD 465/2025)