Comparison of Operation Performance of Diamond Interchanges between China and U.S.A

The diamond-type grade separation is one of the common intersections used on the roadway network. It is widely known that diamond interchanges serve as critical links between two roadways. In this study, a brief introduction of diamond interchange of China and USA is provided. The purpose of this paper is to analyze and compare these two interchanges’ operation performance in terms of their geometry characteristics, traffic signal control and safety implication. The study also focuses on the discussion on the characteristics and applicability of Chinese diamond interchange.