ABSTRACT

Road safety is connected with pavement skid resistance which often triggers pavement maintenance issues. So far, many laboratory studies have been conducted trying to find a link between skid resistance and macrotexture. However, the findings cannot be extrapolated always in the field because of the multi-parametric nature of skid resistance. This triggered the present study that aims to identify key aspects of skid resistance and its main textural components, macro and microtexture. The goal is twofold: to present and assess the effect of seasonal variation on a long-term basis focusing mainly on Mediterranean climate zone and illustrate the cumulative traffic effect on skid resistance and macrotexture in the field, while paying attention to the key-role of microtexture. Study findings showed that under the effect of cumulative traffic, macrotexture and skid resistance start presenting an inverse trend. This trend seems to be related to the equilibrium phase of skid resistance performance, after which seasonal variation becomes less pronounced. In addition, the cumulative traffic in conjunction with weather variations are proved to be critical for the microtexture component. Ultimately, the study findings demonstrated the necessary awareness of constraints in using only macrotexture data to develop models for predicting field skid resistance levels.

摘要

道路安全与经常引发路面维护问题的路面防滑性有关。到目前为止，已经进行了许多实验室研究，试图找到防滑性和宏观纹理之间的联系。然而，由于防滑性的多参数性质，这些发现不能总是在现场进行推断。这引发了本研究，该研究旨在确定防滑性的关键方面及其主要纹理成分、宏观和微观纹理。目标是双重的：主要关注地中海气候区，展示和评估季节性变化的长期影响，并说明交通对防滑性和现场宏观纹理的累积影响，同时注意关键作用微观纹理。研究结果表明，在累积流量的影响下，宏观结构和防滑性开始呈现相反的趋势。这种趋势似乎与防滑性能的平衡阶段有关，之后季节性变化变得不那么明显。此外，与天气变化相结合的累积流量被证明对微纹理组件至关重要。最终，研究结果表明，在仅使用宏观纹理数据来开发预测现场防滑水平的模型时，必须了解约束的必要性。