Optical module, notably for a vehicle lighting and/or signalling device, comprising: - a lens, - at least two light sources, notably two LEDs (6, 8, 10, 12, 14, 16) positioned facing the one same face of the lens, and - means (17, 19) making it possible to command the illumination of at least one of the sources independently of the other (6, 8, 12, 14, 16); the module being designed to produce, by means of the lens, a beam (28; 34) able to constitute part, notably the entirety, of a regulatory beam having no cutoff, notably a beam of the daytime running lights type, in which the lens has a line of focal points on which or in the vicinity of which the sources (6, 8, 10, 12, 14, 16) are situated, at least one of the light sources being arranged in such a way that the beam that it emits enters the lens directly, characterized in that the lens has a light exit face having a cross section of elliptical shape in at least a vertical plane, that one of the two focal points of the ellipse that is closest to the face being situated on the face, said focal points constituting the line of focal points on which or in the vicinity of which the sources are situated, this elliptical shape being the same in all vertical sections taken on planes parallel to X and Z directions, and lying on a curve that forms the cross section of the lens in its horizontal medium plane, the direction Z being vertical and the direction X being horizontal and parallel to the direction of running of the vehicle. - a lens, - at least two light sources, notably two LEDs (6, 8, 10, 12, 14, 16) positioned facing the one same face of the lens, and - means (17, 19) making it possible to command the illumination of at least one of the sources independently of the other (6, 8, 12, 14, 16); the module being designed to produce, by means of the lens, a beam (28; 34) able to constitute part, notably the entirety, of a regulatory beam having no cutoff, notably a beam of the daytime running lights type, in which the lens has a line of focal points on which or in the vicinity of which the sources (6, 8, 10, 12, 14, 16) are situated, at least one of the light sources being arranged in such a way that the beam that it emits enters the lens directly, characterized in that the lens has a light exit face having a cross section of elliptical shape in at least a vertical plane, that one of the two focal points of the ellipse that is closest to the face being situated on the face, said focal points constituting the line of focal points on which or in the vicinity of which the sources are situated, this elliptical shape being the same in all vertical sections taken on planes parallel to X and Z directions, and lying on a curve that forms the cross section of the lens in its horizontal medium plane, the direction Z being vertical and the direction X being horizontal and parallel to the direction of running of the vehicle. the module being designed to produce, by means of the lens, a beam (28; 34) able to constitute part, notably the entirety, of a regulatory beam having no cutoff, notably a beam of the daytime running lights type, in which the lens has a line of focal points on which or in the vicinity of which the sources (6, 8, 10, 12, 14, 16) are situated, at least one of the light sources being arranged in such a way that the beam that it emits enters the lens directly, characterized in that the lens has a light exit face having a cross section of elliptical shape in at least a vertical plane, that one of the two focal points of the ellipse that is closest to the face being situated on the face, said focal points constituting the line of focal points on which or in the vicinity of which the sources are situated, this elliptical shape being the same in all vertical sections taken on planes parallel to X and Z directions, and lying on a curve that forms the cross section of the lens in its horizontal medium plane, the direction Z being vertical and the direction X being horizontal and parallel to the direction of running of the vehicle.