Vehicle with a retractable underrun protection bar

The vehicle has an anti-embedded bar (10) that is transversally linked to two longitudinal slide rail (1). A linking arm has front (30) and back sections (40) joined mutually with each other, where the front section is joined to the slide rail and the back section is joined to the anti-embedded bar. The anti-embedded bar is moved transversally between an upper and lower position in a reference plane (P).