CASE STUDY Flipped Left Diamond Interchange, Another Innovative Design in the Tool Box U By Ali Mozdbar, P.E., PTOE (F) nnecessary stops and delays at intersections can be a huge source of frustration to road users. The proposed Flipped Left Diamond Interchange (FLDI) design is a new, simple concept that has the potential to enhance intersection capacity while reducing such stops and delays. As this is a new concept, engineering staff and designers should realize that attention to details is critical for safe operation and maneuver- shutterstock/Vectorina ability through the intersection. w w w .i t e.or g Augu st 2020 43http://www.ite.org