Scholarlink

Free-flow speed (FFS) is one of the most important parameters for analyzing two-lane rural highways (TWRH). Determining this speed is highly demanding fieldwork, so a simplified approach is often applied by measuring only at one location within the section. In this research, the FFS was measured using different methods that take into account the horizontal geometry of the complete section. The results indicated that FFS can differ by up to 20% compared to simplified measurements and the application of the US Highway Capacity Manual 7th Edition. Such differences can significantly impact determining the operational performance of two-lane rural highways, especially in complex geometric conditions.

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Uncertainties in Determining Free-Flow Speed for Two-Lane Rural Highways

  • 会议论文

  • 发表日期：

    2026年

查看全文
  • Ammar Šarić,
  • Mirza Pozder,
  • Suada Sulejmanović,
  • Sanjin Albinović,
  • Žanesa Ljevo,
  • Selma Spahić

摘要

Free-flow speed (FFS) is one of the most important parameters for analyzing two-lane rural highways (TWRH). Determining this speed is highly demanding fieldwork, so a simplified approach is often applied by measuring only at one location within the section. In this research, the FFS was measured using different methods that take into account the horizontal geometry of the complete section. The results indicated that FFS can differ by up to 20% compared to simplified measurements and the application of the US Highway Capacity Manual 7th Edition. Such differences can significantly impact determining the operational performance of two-lane rural highways, especially in complex geometric conditions.