The use of high friction surface treatments (HFST) has become increasingly popular to help improve roadway friction properties and reduce the number of lane-departure and breaking-related accidents. Conventional HFST installation consists of applying an epoxy-resin material to an existing roadway surface and “gluing” a hard, highly angular fine aggregate to the roadway surface. When constructed correctly, skid resistance values (SN40) are often measured in the upper 60s and 70s. However, this functional overlay does not come without potential issues. Performance and service life is strongly dependent on the quality of the construction process, as well the quality of the substrate, which is often difficult to assess in situ. The paper summarizes the forensic testing of three HFST installations in New Jersey—one performing well and two showing premature failure. Testing procedures and preliminary criteria for existing asphalt pavement surfaces were developed to address whether or not epoxy-resin HFST is a viable option. Additionally, the paper summarizes the development and forensic testing of a potential alternative to the epoxy-resin based HFST application. This alternative surface, called a high friction chip seal (HFCS), incorporates the same hard, highly angular fine aggregate but using asphalt binder as the “gluing” medium within the chip seal application process. Three different aggregate sources were evaluated using the HFCS application on Rt 68 in New Jersey. Laboratory testing of the aggregates, as well as field measurements of the test sections, were conducted. It was found that HFCS could be a potential alternative for areas where premature HFST failure is a concern.

高摩擦表面处理（HFST）的使用已日益普及，以帮助改善道路摩擦性能并减少车道偏离和与停车有关的事故的数量。常规的HFST安装包括将环氧树脂材料施加到现有的路面上，然后将硬的，高角度的细骨料“粘合”到路面上。如果构造正确，通常会在60年代和70年代的上半部分测量防滑阻力值（SN40）。但是，这种功能叠加并不是没有潜在问题的。性能和使用寿命在很大程度上取决于施工过程的质量以及基板的质量，而基板的质量通常很难就地评估。本文总结了新泽西州的3台HFST安装的法医测试，其中1台性能良好，另外2台显示过早失效。制定了现有沥青路面的测试程序和初步标准，以解决环氧树脂HFST是否可行的问题。此外，本文总结了基于环氧树脂的HFST应用的潜在替代品的开发和法医测试。这种替代表面称为高摩擦碎屑密封（HFCS），它包含相同的硬质，高角度细骨料，但在碎屑密封应用过程中使用沥青粘合剂作为“胶合”介质。使用新泽西州Rt 68上的HFCS应用程序评估了三种不同的聚集体来源。骨料的实验室测试以及测试部分的现场测量，进行了。已经发现，对于担心HFST过早失效的地区，HFCS可能是一种潜在的替代方案。