Shafahi, Y., and Haghani, A (2003) compares between single point and conventional urban diamond interchanges based on estimated delay. was analysis is based on simulation of a Single Point Urban Diamond Interchange. Since the comparison is based on benefits that may be accrued, it is desirable to minimize the cost of each alternative, based on savings obtained from a reduction in average stopped vehicle delay. The results of this paper that was found that in 80% of the examples, the ASPUDI produced a delay saving over the CDI design. In particular, in the examples where there is high traffic flow near the capacities, ASPUDI is always superior, in terms of shorter delay time.