The data of the matrix of transports are, of course, result of a historical process, and the presented distortions do not have, however, to serve to disrespect the importance of the road segment, that, after all, is the modal one more used in the country, being responsible for putting into motion about 60% of the transportable load total (FLEURY, 2003). One adds that ‘ ‘ Road transport of Chemical Products Perigosos’ ‘ n 96,044 was regulated in Brazil through the approval of the Decree, of 18 of May of 1988. It is emphasized that the characterization and framing of the products chemistries as dangerous for the transport is restricted it those constants amongst the nine classrooms of materials established in Resolution 420/04 of the ANTT? National agency of Terrestrial Transports, that is based on the main classrooms of defined chemical products as dangerous, established for the ONU (1997), namely: Classroom 1?
Explosives Classroom 2? Gases Classroom 3? Inflammable liquids Classroom 4? Inflammable solids Classroom 5? Oxidantes substances? organic peroxides. Classroom 6? Toxic substances and the infectantes Classroom 7? Radioactive materials Classroom 8? Corrosive Classroom 9? Diverse dangerous substances Thus, ahead of the displayed one, problematiza that the road transport of dangerous products is presented as a passvel and potential activity how much to a series of ambient risks, a time that in this operation the products are citizens to a series of situations combined for the adverse factors, such as the precarious state of the ways, the lack of maintenance, volume of traffic, atmospheric lack of signalling, adverse conditions, state of conservation of the vehicle and experience of the conductor. Advancing in the quarrel, second study carried through in the years of 2006, 2007, 2008 and 2009, under coordination and direction of the IBAMA, the road transport of chemical products what most of .causing accidents of some type of ambient impact in all Brazil is represented (IBAMA, 2010).