Public transportation is an activity facing various problems. One of them, very complex and dangerous, is terrorism which together with criminal activities and vandalism, is making the top of the threats affecting public transportation and therefore urban life quality. Public transportation has several characteristics which make it vulnerable to terroris attacks and a main target for them. To compensate for these weeknesses, certain solutions are necessary to prevent the attack or in case it already took place, to reduce the human and material losses.
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