Unconventional Intersection/Interchange Designs & Strategies (UIDS) refers to a class of innovative intersection and interchange designs and strategies that attempt to increase the intersection capacity or enhance safety. Unconventional Intersection/Interchange Designs (UID) generally reroutes one or more movements in the intersection using a unique geometric design. One of the benefits brought by this creative design may be the reduction of crossing points. Unconventional designs also reduce the number of signal phases, or even eliminate them altogether. Some other unconventional designs may emphasize critical movements or split the intersection plane. All of the designs aim to decrease delay and improve the capacity and safety of the intersection. All the designs can be classified according to whether or not they use traffic signals and whether they are grade-separated, which means split-level.
