Editorial: Managing future motorway and urban traffic systemsEditorial: Managing future motorway and urban traffic systems Εισαγωγή Επιμελητή Editorial 2024-04-122022enRoad networks and urban transportation systems must, nowadays, accommodate an ever-growing demand. Population growth, urban sprawl, and increasing trips generated by the complex activity-travel patterns of our modern society are generating unprecedented traffic flow and congestion levels, which are challenging our limited natural resources and constrained land availability, and are a main cause of pollution and climate change. Policies worldwide are looking for alternatives to better match the offered supply with the demand, without resorting to expensive infrastructure expansions, which are well known to induce additional demand, often at the stake of more sustainable travel options (e.g., public transport, active modes). In this context, traffic and transportation management is seen as a powerful set of strategies to adapt the supply capacities and resources to the spatial and temporal variations of the demand. Given the above motivations and trends, with this Special Issue we aim to identify and assess different scenarios where CAVs and automated mobility services will substantially penetrate the market and will be part of the traffic flow.http://creativecommons.org/licenses/by/4.0/Transportation Research Part C: Emerging Technologies142 Viti Francesco Papamichail Ioannis Παπαμιχαηλ Ιωαννης Menéndez Mónica Wang Meng Elsevier Road networks Urban transportation systems Traffic and transportation management Connected and Automated Vehicles (CAVs)