Traffic simulation is a computer-based modeling technique used to replicate and analyze the flow of vehicles and pedestrians in a given area. By using algorithms and real-world data, these simulations help urban planners and traffic engineers understand how different factors, such as road design and traffic signals, affect congestion and safety. These simulations can visualize various scenarios, such as the impact of new roads or changes in traffic patterns. Tools like VISSIM and SUMO are commonly used for this purpose, allowing stakeholders to make informed decisions to improve transportation systems and enhance overall mobility.