SUMO is an open-source traffic simulation package that includes simulation applications and supporting tools for network import and demand modeling. It is used to investigate various research topics, particularly in traffic management and vehicular communications. SUMO has evolved into a comprehensive suite of traffic modeling utilities, including road network importers, demand generation, and simulation tools. The package is primarily developed by the Institute of Transportation Systems at the German Aerospace Center (DLR), with contributions from external parties. SUMO supports the simulation of microscopic traffic flow, allowing detailed modeling of vehicle behavior, routes, and interactions. It includes tools for generating and importing road networks, simulating traffic demand, and performing dynamic user assignment. The simulation can be run in a command-line interface or with a graphical user interface (GUI) for visualization. SUMO also provides an API called TraCI for online interaction with external applications, enabling real-time control and adaptation of simulations. SUMO is used in various research areas, including vehicular communication, route choice and dynamic navigation, traffic light algorithms, and evaluation of traffic surveillance systems. It supports the simulation of V2X (vehicle-to-vehicle and vehicle-to-infrastructure) communication, traffic management, and emergency vehicle prioritization. SUMO has been applied in projects such as TrafficOnline, iTETRIS, VABENE, and CityMobil, where it helps evaluate traffic scenarios, simulate large-scale traffic, and assess the impact of new technologies on traffic systems. Recent extensions to SUMO include models for noise and pollutant emissions, as well as person-based intermodal traffic simulation. These features enhance the simulation's ability to evaluate environmental impacts and complex traffic scenarios. SUMO continues to develop, with a focus on improving simulation accuracy, expanding functionality, and enhancing interoperability with other traffic and simulation tools. It aims to remain a leading platform for traffic simulation and research in vehicular communication and traffic management.SUMO is an open-source traffic simulation package that includes simulation applications and supporting tools for network import and demand modeling. It is used to investigate various research topics, particularly in traffic management and vehicular communications. SUMO has evolved into a comprehensive suite of traffic modeling utilities, including road network importers, demand generation, and simulation tools. The package is primarily developed by the Institute of Transportation Systems at the German Aerospace Center (DLR), with contributions from external parties. SUMO supports the simulation of microscopic traffic flow, allowing detailed modeling of vehicle behavior, routes, and interactions. It includes tools for generating and importing road networks, simulating traffic demand, and performing dynamic user assignment. The simulation can be run in a command-line interface or with a graphical user interface (GUI) for visualization. SUMO also provides an API called TraCI for online interaction with external applications, enabling real-time control and adaptation of simulations. SUMO is used in various research areas, including vehicular communication, route choice and dynamic navigation, traffic light algorithms, and evaluation of traffic surveillance systems. It supports the simulation of V2X (vehicle-to-vehicle and vehicle-to-infrastructure) communication, traffic management, and emergency vehicle prioritization. SUMO has been applied in projects such as TrafficOnline, iTETRIS, VABENE, and CityMobil, where it helps evaluate traffic scenarios, simulate large-scale traffic, and assess the impact of new technologies on traffic systems. Recent extensions to SUMO include models for noise and pollutant emissions, as well as person-based intermodal traffic simulation. These features enhance the simulation's ability to evaluate environmental impacts and complex traffic scenarios. SUMO continues to develop, with a focus on improving simulation accuracy, expanding functionality, and enhancing interoperability with other traffic and simulation tools. It aims to remain a leading platform for traffic simulation and research in vehicular communication and traffic management.