Abstract: The invention relates to a method of visually representing the variation over time of a difference between a real value of a parameter and an optimum value thereof using at least three activatable light signals, said method comprising: a first transition step (105) that is performed if the current range of values is contiguous with a prior range of values, in which step, after a first delay has elapsed, the signal associated with the prior range of values is deactivated and the light signal associated with the current range of values is activated; and a second transition step (107) that is performed if the current range of values is not contiguous with the prior range of values, during which step, after a second delay has elapsed, the light signal associated with the prior range of values is deactivated and the light signal associated with an intermediate range of values corresponding to a range of values contiguous with the prior range of values, is activated, and then after a third delay has elapsed, the

Abstract: The invention relates to a driving assistance device (100) for a vehicle that is to travel along a defined run between a first point and a second point. The invention is characterized by the fact that the assistance device comprises generator means for generating a curve of optimum driving profiles seeking to optimize the energy consumed by the vehicle in order to travel along the run and to optimize the time taken to travel along the run, means (180) for determining a current driving profile at a current position of the vehicle, means (220) for determining an optimum driving profile for the current position from the curve of optimum profiles, a comparator (300) for determining a difference between the current driving profile and the optimum driving profile for the current position, and means (320) for correcting the driving profile of the vehicle as a function of the difference (?t)) as determined.

Abstract: The invention relates to an autonomous wheeled vehicle (100; 200) having a driver's cabin (16) and a space (18) for transporting passengers and/or objects, to a coupling procedure, to an uncoupling procedure, and to a method of managing said vehicles, and also to the resulting vehicle train. In characteristic manner, the vehicle includes: a steering front axle (12); a retractable coupling system (22) comprising a first portion (221) situated at the front of the vehicle (100; 200) and a second portion (222) situated at the rear of the vehicle (100; 200), the first portion (221) of one vehicle (100; 200) being suitable for co-operating with the second portion (222) of another vehicle (100; 200) when the coupling system (22) is extended, so as to connect the vehicles (100; 200) together by forming a coupling between them; and also protector means for protecting said coupling. The invention is applicable to buses.