Related Experiment Video
Updated: Aug 18, 2026

Evaluating the Effect of Roadside Parking on a Dual-Direction Urban Street
Published on: January 20, 2023
Analysis of factors affecting the severity of conflicts between right-turning heavy vehicles and non-motorized
Ling Gui1,2,3, Bo Xu1,2,3, Jian Lu1,2,3
1Jiangsu Key Laboratory of Urban ITS, Southeast University, Nanjing, China.
Objective:
To deconstruct the microscopic dynamic games and risk evolution mechanisms between right-turning heavy vehicles (HVs) and non-motorized vehicles (NMVs) at signalized intersections.
Methods:
High-fidelity unmanned aerial vehicle (UAV) video data from three intersections in Nanjing were used to extract 527 conflict events and reconstruct five interaction patterns. Using time-to-collision (TTC) and post-encroachment time (PET) as surrogate safety measures, K-means clustering categorized conflict severity into potential, moderate, and severe levels. An ordered logit model (OLM) with interaction terms was developed to quantify the non-linear impacts of vehicle kinematics, behaviors, and environmental factors.
Results:
HV speed and jerk (deceleration rate) are primary catalysts for severe conflicts. Microscopic behaviors exhibit a "double-edged sword" effect: proactive HV yielding reduces risk, but being "forced to stop" by NMVs during yielding increases severe conflict probability by 11.8%. A "safety in numbers" effect (>4 NMVs) decreased risk by 6.0%, while comprehensive safety facilities reduced severe conflict probability by 7.7%.
Conclusions:
This study reveals dynamic risk mechanisms for right-turning HVs, providing an empirical basis for optimizing intersection facility deployment and advanced driver assistance system (ADAS) warning strategies to enhance traffic safety.
Related Concept Videos
Design Example: Alignment of a Road Line Using GIS
Social Traps
Friction: Problem Solving
Initially, a visual representation of the...
Frustration and Conflict: Approach-Approach, Approach-Avoidance
One common type of conflict is the Approach–Approach Conflict. In this case, a person faces two desirable options,...
Frustration and Conflict: Avoidance-Avoidance, Double-Approach Avoidance
Collisions in Multiple Dimensions: Problem Solving
A small car of mass 1,200 kg traveling east at 60 km/h collides at an intersection with a truck of mass 3,000 kg traveling due north at 40 km/h. The two vehicles are locked together. What is the...

