A Comparison of Daytime and Nighttime Operating Speed on Rural Multi-lane Highway Sections in Egypt
Traditionally, the 85th percentile of observed speeds is used to represent the operating speed associated with a specific site with certain geometric features. The presence of sunlight enhances the vision of drivers during daytime while visibility usually degrades during nighttime, especially on rural roads where no street lighting exists, and drivers would depend solely on their vehicle headlights. Visibility degradation ... إقراء المزيد