The president of the departmental council or, where he is the authority holding traffic police powers, the mayor or the president of the public establishment for inter-communal cooperation may set, for sections of roads outside built-up areas under his jurisdiction and not comprising at least two lanes assigned to the same direction of traffic, a maximum authorised speed 10 km/h higher than that provided for in the highway code. This decision takes the form of a reasoned order, issued after consultation with the departmental road safety committee, on the basis of an accident study covering each of the road sections concerned.