Road vehicle comprising an ignition system for the powertrain system comprising in turn a luminous device integral with the passenger compartment of the road vehicle and comprising an optical sensor configured to detect at least a first gesture and a second gesture performed by the driver to switch from an off configuration to an on configuration of the road vehicle and vice versa; the luminous device comprising a display device configured to at least partially assume a first colour and a second colour; wherein the display device is configured to switch from the first colour to the second colour when the movable part switches from the off configuration to the on configuration and vice versa when the movable part switches from the on configuration to the off configuration. Principal figure: 3.