Congestion pricing and queuing theory Consider a queuing facility with a single type of customer in steady-state. Let c= delay cost per unit time per customer C=total cost of delay per unit time incurred in the system at equilibrium C=cL=chW and the marginal delay cost, MC, imposed by an additional ("marginal")customer is given by Mc: dc cw+c1 d1 d入Congestion pricing and queuing theory q Wq C = cL = cl MC = dC dl = c Wq + cl dWq dl Consider a queuing facility with a single type of customer in steady-state. Let c = delay cost per unit time per customer C = total cost of delay per unit time incurred in the system at equilibrium and the marginal delay cost, MC , imposed by an additional (“marginal”) customer is given by: