Transport nodes concentrate large, time-sensitive crowds into constrained spaces shaped by infrastructure and regulation. BIEM converts movement, dwell, and crowding into structured signals that expose choke points, ineffective routing, and mismatches between capacity and demand. By connecting these patterns to gates, platforms, checkpoints, and amenities, BIEM provides a defensible basis for tuning wayfinding, reallocating staff, and staging services so that hubs remain resilient even when schedules and traffic patterns shift.