After the appearance of the Corona virus, it has become beyond a reasonable doubt that human health
and safety are risks and epidemics and maintain its security in the first place and the value of scientific research
is the most important thing now. In this research paper, I refer to the seriousness of smoke in tunnels, especially
car tunnels and what results from them as a result of accidents or cars burning inside Tunnels and how to get rid
of smoke so that it does not affect human safety and how to reduce the negative effects of the fire so that people
can escape and this paper deals with ventilation and smoke management after a fire occurs in several ways.