A new, side-mounted, steel beam-and-post bridge rail was designed, crash tested, and evaluated according to safety performance guidelines included in the American Association of State Highway and Transportation Officials Manual for Assessing Safety Hardware (MASH) for Test Level 4 (TL-4). The new bridge rail system was designed to be compatible with multiple bridge decks, including cast-in-place concrete slabs and prestressed box beams. Additionally, the bridge rail was designed to remain crashworthy after roadway overlays up to 3 in. thick. The bridge rail was designed and optimized based on strength, installation cost, weight per foot, and constructability. The new bridge rail consisted of three rectangular steel tube rails supported by standard steel cross section, W6 × 15 steel posts spaced at 8 ft on-center. The upper rail was a 12 × 4 × ¼ in. hollow structural section (HSS) steel tube, and the lower two rails were 8 × 6 × ¼ in. HSS steel tubes. The top mounting heights for the upper, middle, and lower rails were 39 in., 32 in., and 20 in. above the surface of the deck, respectively. A new, side-mounted, post-to-deck connection was also developed that incorporated HSS steel spacer tubes that offset the posts 6 in. from the bridge deck and aligned the face of the bridge rail with the edge of the deck. Thus, the traversable width of the bridge was maximized. Three full-scale crash tests corresponding to the MASH TL-4 testing matrix were performed on the new bridge rail. All three crash tests successfully contained and redirected the vehicles and satisfied all MASH evaluation criteria.

根据美国国家公路和运输协会安全硬件评估手册中包含的安全性能指南，设计了一种新的侧面安装式钢制梁柱式桥梁，并进行了碰撞测试和评估。（MASH），用于测试级别4（TL-4）。新的桥轨系统旨在与多个桥面板兼容，包括现浇混凝土板和预应力箱形梁。此外，桥轨的设计旨在在车道覆盖厚度达3英寸的情况下仍然具有防撞性。根据强度，安装成本，每英尺重量和可施工性对桥轨进行了设计和优化。新的桥轨由三个矩形钢管轨组成，这些钢管轨由标准钢制横截面，W6×15钢柱支撑，中心间距为8英尺。上部导轨是12×4×¼英寸空心结构截面（HSS）钢管，下部两个导轨是8×6×¼英寸HSS钢管。上部，中部和下部导轨的顶部安装高度分别比平台表面高39英寸，32英寸和20英寸。一个新的 还开发了侧面安装的，后到甲板的连接，该连接并入了HSS钢制间隔管，该间隔管使立柱6偏离桥面板，并使桥轨的表面与桥面板的边缘对齐。因此，桥的可移动宽度被最大化。在新的桥轨上进行了三个与MASH TL-4测试矩阵相对应的全面碰撞测试。所有这三个碰撞测试均成功地容纳并重定向了车辆，并满足了所有MASH评估标准。在新的桥轨上进行了三个与MASH TL-4测试矩阵相对应的全面碰撞测试。所有这三个碰撞测试均成功地容纳并重定向了车辆，并满足了所有MASH评估标准。在新的桥轨上进行了三个与MASH TL-4测试矩阵相对应的全面碰撞测试。所有这三个碰撞测试均成功地容纳并重定向了车辆，并满足了所有MASH评估标准。