Remarque: l’opérateur du tunnel alerte les services de secours externes et, s’il en existe, le service d’intervention interne (surtout pour les longs tunnels à fort trafic)."
Annual average daily traffic (abbr. aadt), английский Total volume passing a point or segment of a road (in both traffic directions where applicable) for one year divided by the number of days in the year, expressed in terms of vehicles per day.
