Humanitarian access in Sudan: the corridor question nobody has closed
Volumes are not the constraint; agreement on terms that hold for more than a few weeks is.
Aid volumes are not the binding constraint in Sudan. Access is. A corridor only functions when every party along it accepts the same terms for the same period, and that agreement has repeatedly been partial or short.
Port Sudan carries most of what arrives from outside, which makes the road network inland the decisive variable. Each additional checkpoint adds cost, delay and risk to consignments that are already time-limited.
Local markets do part of the work that convoys cannot. Where traders can still move goods, cash transfers reach people faster than shipments; where markets have closed, nothing substitutes for physical access.
What would signal a durable change is unglamorous: notification procedures that hold for more than a few weeks, and a deconfliction line that both sides answer.