In a simple system of 5 ports along a coast, for case A, the traffic for each port is the same, so there is no concentration and thus no inequality. The Lorenz curve of this distribution is the same as the perfect equality line; they overlap. In case B, there is some traffic concentration in two ports, which is reflected in the Lorenz curve as it is different from the perfect equality line. Case C represents a high concentration level in two ports, and the Lorenz curve is significantly different from the perfect equality line.