The capacity without any expansion is 28 (thousand) cars per hour. This would indicate that a serious problem will exist if there are 33,000 cars per hour leaving the stadium. The problem is not leaving node 1 or going into node 8. At node 2, only the outflow is only 12 whereas the capacity from 1 to 2 is 15. Also, the capacity from 1 to 3 is only 12, but the capacity leaving 3 is 14. A similar problem exists at node 4. The total capacity from nodes 2, 3, and 4 is only 31. Thus, the problem is a mismatch of the capacity going into the nodes with the capacity leaving these nodes.