The maximum speed limit road marking shown in the image will establish the speed in kilometers per hour that no vehicle circulating on that road may exceed, even if the generic maximum speed of the road is higher.
If the figure is also located in a lane delimited by longitudinal lines, the maximum speed indication will only be applicable to vehicles traveling in that lane exclusively.
Thus, in this case, even if the generic maximum speed of the road is 90 km/hour, in this specific section we shall not exceed 80 km/hour.