How Driver's Psychological Situations are affected by the Density of Traffic and Response to Congestion

The phenomenon of traffic is derived from complex and several causes that draw on intensity complications and problems. In this article, we surveyed the psychological-social aspects of traffic in respect to the psychology of application and social phenomena. The supposition of the survey is that traffic is a phenomena that can result in contact between the density and response to congestion on the one hand, and offensive and negative emotional states from traffic flow on the other. In addition, this relation is affected by emotional states of users of the transportation system and their interpretation about the type of friendly or hostile relationship with others. As a result, the congestion in traffic flow causes excitation of drivers and pedestrians. The existence of density and congestion in big cities, especially in main streets, is inevitable and so significant efforts have been made to solve traffic problems through traffic rules and laws, which can clash with social norms and sometimes confirm and or causes destroy such behavioral rules. Social conformity on the flexibility or institutionalization of rules can affect driver's behavior, and this is an important case caused by abnormalities from the response to congestion.