Many intersection project sites in North Carolina, and probably across the U.S., have asymmetric conditions. There is typically heavier demand from one approach than the others, right of way is more restricted in one or two quadrants than in the others, pedestrian demand is concentrated in one crosswalk, and so forth. However, the literature on alternative intersections and the software that planners and engineers use to explore suitable alternatives primarily provide symmetric and full designs. Analysts reading the FHWA guidebooks on alternative designs or looking at the menus of CAP-X or VJUST would be led to believe that their options were limited. Fortunately, in the past few years it has become apparent that there are many more intersection design options than presented in CAP-X or VJUST. The objective of this paper is to demonstrate that designers can combine pieces of the alternatives in many creative ways to find asymmetric designs that better fit whatever asymmetric conditions they are given. This paper shows some hybrid at-grade and grade-separated intersection designs that seem to have potential to increase efficiency, increase the quality of the pedestrian and bicyclist crossing experience, decrease impacts, and have other benefits. Based on these examples, it should be apparent that many interesting combinations are possible. Designers wanting to explore a hybrid cannot use the usual software to do so, but the tools to analyze a hybrid design are available if one knows where to look.

北卡罗来纳州，甚至可能遍及美国的许多交叉路口项目地点，条件都不对称。通常，一种方法的需求要比其他方法要重，在一个或两个象限中，通行权要比其他方法受到更多的限制，行人需求集中在一个人行横道上，依此类推。但是，有关替代交叉口的文献以及规划人员和工程师用来探索合适替代方案的软件主要提供对称和完整的设计。如果分析人员阅读FHWA有关替代设计的指南，或者查看CAP-X或VJUST的菜单，就会认为他们的选择是有限的。幸运的是，在过去几年中，很明显，与CAP-X或VJUST相比，路口设计选项更多。本文的目的是证明设计师可以多种创新方式组合各种替代方案，以找到更适合任何给定非对称条件的非对称设计。本文显示了一些混合的坡道和坡道交叉口设计，这些设计似乎有潜力提高效率，提高行人和骑自行车的人过马路的质量，减少影响并具有其他好处。基于这些示例，很明显，许多有趣的组合都是可能的。想要探索混合动力的设计者不能使用常规软件来这样做，但如果知道了哪里，就可以使用分析混合动力设计的工具。