Abstract: The present invention relates to a barrier construction for removably closing road passages, which comprises two cables, spaced from one another, and coupled, at the end portions thereof, to stretching assemblies, provided near the terminal portions of the end passage. Between the two cables are supported spacer plates, provided with a resting foot. The cables are arranged at such a level as to define therebetween the average of the values of the heights of the centers of gravity of conventional vehicles or, anyhow, such as to hold therein the minimum and maximum heights of a guard-rail of conventional type.