Offset-T intersections represent a special geometric configuration where two three-leg intersections adjoin the major road from opposite directions within a short separation distance. The prevalence of offset-T intersections in rural areas coupled with the lack of research evaluating their safety performance led to the development of a series of safety performance functions for rural stop-controlled intersections that considered the effects of the offset direction and separation distance. In addition, crash modification factors (CMFs) were developed to estimate the change in crash frequency associated with converting a rural offset-T intersection into a conventional four-leg intersection. A series of mixed-effect negative binomial models for crash occurrence was generated based on 10 years of crash data from a sample of 299 offset-T intersections and 301 four-leg intersections with minor stop control along rural two-lane highways in Michigan. Compared with conventional four-leg intersections, offset-T intersections exhibited 35% more crashes regardless of the offset distance or direction. Considering crash types, single motor vehicle crashes occurred more frequently at offset-T intersections, and increased as the offset distance increased. Rear-end crashes also occurred more frequently at offset-T intersections, with left offsets having greater crash occurrence than right offsets. However, angle crashes were 40%–69% lower at offset-T intersections because of the elimination of the direct crossing maneuver. Considering the ranges of offset distance and direction utilized within this study, the total (non-animal) CMF for converting an offset-T into a four-leg intersection was 0.74.

T偏移路口代表一种特殊的几何形状，其中两个三腿路口在较短的分隔距离内从相反的方向邻接主要道路。农村偏距-T交叉口的流行以及缺乏评估其安全性能的研究，导致了针对乡村停车控制交叉口的一系列安全性能函数的开发，其中考虑了偏距方向和分隔距离的影响。此外，还开发了碰撞修正因子（CMF）来估计与将农村偏距T型十字路口转换为传统的四腿十字路口相关的碰撞频率变化。基于密歇根州农村两车道公路上299个偏距-T交叉口和301个四腿交叉口的采样，并基于10年的碰撞数据，生成了一系列混合的碰撞负作用二项式模型，以进行10年的碰撞数据。与传统的四腿交叉路口相比，偏移T型交叉路口的碰撞事故多出35％，无论偏移距离或方向如何。考虑到碰撞类型，单个机动车碰撞在T形交叉路口发生的频率更高，并且随着偏移距离的增加而增加。后端碰撞在T形交叉口处也更频繁地发生，左偏移比右偏移具有更大的碰撞发生率。但是，由于取消了直接穿越机动，在偏移T形交叉处的角撞事故降低了40％–69％。