1. Method for projecting at least one image, by a projection system of a motor vehicle comprising a device for detecting an event, an estimation device capable of estimating the time taken to reach said event, a processing unit capable of generating a control signal, a projection device capable of receiving the control signal and projecting digital images, and a storage unit storing at least one image representative of a pictogram, wherein said projection method comprises the following steps: a) detecting an event, b) estimating the time taken to reach the event, c) selecting at least one image representing a pictogram characteristic of the detected event, and d) establishing a sequence of images representing an animation of said pictogram, said sequence of images being paced depending on the time estimated in estimation step b); e) projecting said sequence of images onto the roadway.