Self-propelled vehicle comprising: - a main frame , - two steering wheels articulated to the main frame , - a lifting unit connected to the main frame and adapted to lift a load (L), - a steering system adapted to control the steering wheels and equipped with a steering member , and - a control unit communicating with a detection sensor for detecting a steering angle of the steering wheels and configured for generating on the steering member a haptic signal perceptible by a user of the vehicle , said self-propelled vehicle being characterized by the fact that the control unit communicates with a measuring sensor adapted to measure the value of a parameter of the vehicle that influences the stability of the vehicle itself, said measuring sensor being one from: - an inertial platform , adapted to calculate the accelerations acting on the vehicle and the inclination of the terrain on which the vehicle moves, - an accelerometer configured to measure the accelerations of the vehicle along a plane perpendicular to a longitudinal axis of the vehicle itself, - a speedometer of the vehicle , - a sensor adapted to measure the weight of the load L, - a sensor apparatus adapted to determine the relative position of the load (L) with respect to the main frame , said control unit being configured to: - calculate an alert value of the steering angle of the steering wheels based on the value measured by the measuring sensor, and - generating the haptic signal on the steering member , when the value of the steering angle detected by the detection sensor exceeds the alert value. - a main frame , - two steering wheels articulated to the main frame , - a lifting unit connected to the main frame and adapted to lift a load (L), - a steering system adapted to control the steering wheels and equipped with a steering member , and - a control unit communicating with a detection sensor for detecting a steering angle of the steering wheels and configured for generating on the steering member a haptic signal perceptible by a user of the vehicle , said self-propelled vehicle being characterized by the fact that the control unit communicates with a measuring sensor adapted to measure the value of a parameter of the vehicle that influences the stability of the vehicle itself, said measuring sensor being one from: - an inertial platform , adapted to calculate the accelerations acting on the vehicle and the inclination of the terrain on which the vehicle moves, - an accelerometer configured to measure the accelerations of the vehicle along a plane perpendicular to a longitudinal axis of the vehicle itself, - a speedometer of the vehicle , - a sensor adapted to measure the weight of the load L, - a sensor apparatus adapted to determine the relative position of the load (L) with respect to the main frame , - an inertial platform , adapted to calculate the accelerations acting on the vehicle and the inclination of the terrain on which the vehicle moves, - an accelerometer configured to measure the accelerations of the vehicle along a plane perpendicular to a longitudinal axis of the vehicle itself, - a speedometer of the vehicle , - a sensor adapted to measure the weight of the load L, - a sensor apparatus adapted to determine the relative position of the load (L) with respect to the main frame , said control unit being configured to: - calculate an alert value of the steering angle of the steering wheels based on the value measured by the measuring sensor, and - generating the haptic signal on the steering member , when the value of the steering angle detected by the detection sensor exceeds the alert value. - calculate an alert value of the steering angle of the steering wheels based on the value measured by the measuring sensor, and - generating the haptic signal on the steering member , when the value of the steering angle detected by the detection sensor exceeds the alert value. <EOS>