Driver Gap Acceptance and Passing Sight Distance Analysis on Rural Single-Carriageway Roads Using Field Video Observations
DOI:
https://doi.org/10.65568/gujes.2026.020203الكلمات المفتاحية:
Overtaking behavior، Single-carriageway roads، Gap acceptance، Passing sight distance، Head-on collision riskالملخص
Overtaking maneuvers on rural single-carriageway roads represent one of the most critical sources of head-on collision risk due to limited passing sight distance (PSD) and opposing-lane exposure. This study investigates driver gap acceptance behavior and PSD characteristics under real traffic conditions using field video observations collected on rural undivided highways. A total of 214 overtaking maneuvers were extracted and analyzed using descriptive statistics, correlation analysis, linear regression, and logistic regression modeling. The results demonstrated a significant inverse relationship between operational speeds and accepted overtaking gap, indicating adaptive driver risk-tolerance behavior at higher travel speeds. The developed regression model showed a strong positive relationship between speed and required passing sight distance ( =0.73), expressed as PSD=182.4+3.05V. The findings further revealed that many observed overtaking maneuvers were completed using shorter passing distances than those recommended by AASHTO guidelines, particularly under high-speed conditions. The study contributes to transportation safety research by integrating overtaking behavior, gap acceptance, and PSD analysis within a unified behavioral framework specifically focused on rural single-carriageway roads. The outcomes provide important implications for behavior-aware highway safety assessment and intelligent overtaking assistance systems.
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الحقوق الفكرية (c) 2026 مجلة جامعة غريان للعلوم الهندسية
هذا العمل مرخص بموجب Creative Commons Attribution-NonCommercial 4.0 International License.
