This book offers a comprehensive exploration of the intricate relationship between human behaviour and transportation systems. It examines how individual psychology intersects with mobility patterns, revealing the complex factors that drive our daily travel decisions and interactions on the road. The authors explore key topics like the multidimensional nature of quality of life in relation to transportation, the psychological impact of driving fear and active transport benefits, the symbolic meaning of vehicles, and the influence of both formal regulations and informal social rules. It examines communication patterns among road users, decision-making processes, and how policy interventions and infrastructure design can psychologically influence behaviour towards more sustainable and safer mobility choices. The Psychology of Traffic is primarily aimed at academic scholars and advanced students in transport studies and applied psychology. It can be useful for policymakers and practitioners seeking to understand and influence road user behaviour to create more sustainable, safe, and socially beneficial transportation systems that enhance overall quality of life.