First of all, it makes sure they stay on the hazardous cargo routes, that they don't deviate from them. Also, if they get into an accident, we know exactly what kinds of materials they're carrying, so we can dispatch the proper agencies to handle the situation.
Premièrement, s'assurer que les véhicules restent sur les routes destinées aux cargos dangereux et, en cas d'accident, savoir exactement de quel genre de marchandises il s'agit pour pouvoir envoyer les services appropriés.