Road geometry will meet the needs of some road users to a large area while failing to meet the needs of others. So, reliability theory is used to calculate the safety of each vehicle type using the probabilistic approach. The design of horizontal curves is the focus of the current application, which defines the two-limit state functions one in terms of the available (supply) and stopping (demand) sight distances (SSD) and the other as available (supply) and demanded super elevation (SE). Reliability analysis for SSD results shows that the inner lane of horizontal curves is unsafe than compared to their corresponding outer lanes. Whereas in case of reliability analysis for SE results shows that the inner lane of horizontal curves is safer than compared to their corresponding outer lanes. Combination of two failure modes (multi-mode) is considered in series system as the system fails even if one of the individual mode fails. Car is in unsafe category than compared to other vehicle types in both the single mode and multi-mode reliability analysis. System reliability analysis results shows that it follows similar trend as super elevation i.e., inner lane is safe than compared to their corresponding outer lanes. This study serves as a crucial tool for bolstering the safety of curved segments on highways. It prioritizes identifying high-risk curves, enabling the implementation of targeted countermeasures to enhance overall safety.
Safety Assessment of Horizontal Curves Employing Lane Comparison, Vehicle Type Comparison Based on Single Mode and Multi-Mode Reliability Analysis
Lecture Notes in Civil Engineering
International Conference on Transportation System Engineering and Management ; 2023 ; Warangal, India October 12, 2023 - October 14, 2023
Recent Advances in Transportation Systems Engineering and Management—Volume 1 ; Chapter : 1 ; 1-15
2024-10-02
15 pages
Article/Chapter (Book)
Electronic Resource
English
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