How does dynamic traffic assignment differ from static assignment?

Dynamic Traffic Assignment (DTA) models time-varying traffic: (1) Captures congestion buildup and dissipation over time, (2) Tracks vehicle trajectories through network, (3) Considers queuing and spillback effects, (4) Routes adjust as conditions change (within-day dynamics), (5) Link travel times depend on arrival time and queue state. Models: simulation-based (microsimulation), analytical (cell transmission, link transmission), or hybrid. Applications: real-time traffic management, incident impact, work zone analysis. More computationally intensive than static UE but essential for congested networks.