Assessment of Traffic Operation Performances and Conflicts at Unsignalized Intersection: A Case Study of Matangi Devi Intersection in Gulariya, Bardiya
Student: Pawan Sharma
Supervisor: Asst. Prof. Dr. Pradeep Kumar Shrestha
Submitted Date:
September, 2024
Abstract
This study investigates the traffic performances and traffic conflicts at the unsignalized
Matangi Devi intersection in Gulariya, Bardiya, Nepal, aiming to improve road safety in an
area with a high incidence of vehicle and pedestrian conflicts. The research examines the
operational performance of the intersection and identifies potential countermeasures for
reducing conflicts.
The methodology involved collecting primary data through video graphic surveys and speed
measurements, with machine learning employed to analyze traffic and pedestrian volumes.
The study employed the Aimsun Next software for simulating traffic scenarios, and conflict
points were analyzed using the Surrogate Safety Assessment Model (SSAM). The analysis
provided insights into current traffic flows, delays, and conflict scenarios at the intersection.
On Day 2, the maximum number of conflicts was recorded, with a total of 2,680 conflicts
occurring between various types of vehicles and pedestrians at intersections. The majority
of these conflicts took place where vehicles and pedestrians interacted. Out of the 2,680
conflicts, there were 990 crossing conflicts, 1,275 rear-end conflicts, and 390 lane-change
conflicts. In the current scenario, the overall total number of conflicts stands at 8,895,
including 394 conflicts between pedestrians and vehicles, and 8,501 conflicts between
vehicles.
It was found that while countermeasures involving speed regulation of 20Kmph were more
successful in lowering vehicle-vehicle conflict by 22.739%, they had the opposite effect i.e.
increase conflict by 27.411 % on vehicle-pedestrian conflict. Countermeasures involving
regulatory signs, such as a yield sign, were found to be successful in lowering vehicle-
pedestrian conflict by 26.142 %.
Based on the findings, recommendations include speed regulation of 20 kmph measures and
traffic yield sign installation. Future studies could focus on implementing these measures
and monitoring their long-term impact on traffic safety.
Keywords
Aimsin, Conflicts, Countermeasures, SSAM, Pedestrian, Vehicles.