The law, as it applies to the street, is characterized by the constant search for a balance between the respect of fundamental civil liberties, such as the right to move and to park, and the restrictions of these liberties imposed on certain users of the street in order to facilitate the circulation or the parking of other users. Users are very numerous and diverse, be they store owners, car drivers, pedestrians or dog owners, and therefore the proper balance between authorization and prohibition fluctuates according to time and space. To this diversity of users must be added the diversity of the authorities in charge of regulating the circulation, the occupation and use of the street.