Despite numerous past studies conducted on traffic barriers, research is still needed to analyze the performance of traffic barriers on superelevated horizontal curves. Based on the literature of traffic barrier studies, the effect of geometric features of traffic barriers (such as height and post-spacing) on crashes involving horizontal curves has not been investigated considering actual crash data analysis. This paper seeks to study the effect of various variables affecting the severity of traffic barrier crashes on horizontal curves. Geometric features of 95 miles of traffic barriers were collected, conducting a field inventory on all interstate roads in Wyoming. All the traffic barriers collected were located on horizontal curves with at least one historical crash report between 2008 and 2017. Random-parameters ordered logit was used to develop two models to investigate the factors impacting the severity of horizontal curve crashes involving side and median traffic barriers, respectively, on interstate roads. Based on the results, median box beam barriers with a post-spacing of 6.1 ft resulted in lower injury severity. Median W-beam barriers with a height taller than 31 inches were involved with a higher probability of severe collisions. Side box beam barriers located on the front side-slope were also more likely to increase the severity of crashes.

尽管过去对交通障碍进行了大量研究，但仍需要进行研究以分析超高水平曲线上的交通障碍的性能。根据交通障碍研究的文献，尚未考虑实际的碰撞数据分析来研究交通障碍的几何特征（例如高度和后间距）对涉及水平曲线的碰撞的影响。本文旨在研究影响水平交通曲线碰撞严重程度的各种变量的影响。收集了95英里交通障碍的几何特征，对怀俄明州的所有州际公路进行了现场调查。在2008年至2017年之间，收集的所有交通障碍均位于水平曲线上，至少有一份历史崩溃报告。使用随机参数有序logit来开发两个模型，以研究影响州际公路上分别涉及侧面和中间交通障碍的水平曲线撞车严重性的因素。根据结果​​，后间距为6.1的中间箱形光束屏障 ft导致较低的伤害严重性。高度高于31英寸的中位W形障碍物发生严重碰撞的可能性更高。位于前侧坡的侧箱防撞栏也更有可能增加撞车的严重性。