Abstract
In this paper, in order to study non-lane-based car-following, the non-coaxiality concept is defined, where there is a significant lateral difference between the leader and follower vehicle. Two main reasons for non-coaxiality were addressed by drivers in the interview: providing more visible distances beyond leader vehicle and increasing the possibility of escaping in sudden brakes to avoid rear-end collision. Results showed that non-lane-based behavior was due to the effect of the existence of other cars in the traffic flow. By reducing speed or increasing density, vehicles more affect each other. But this trend will continue up until vehicles fill the free spaces. In other words, vehicles make others stick to the leader’s path in high-density flow. Studying the relationship between lateral distance and time headway demonstrated that time headway threshold for initiation of car-following behavior in Iranian drivers can be approximately 2 seconds. In this study, Overtaking was defined as a part or continuation of the non-lane-based driving behavior. For overtaking on the left, steering angle, the final lateral distance and the lateral speed difference between the follower and leader were 33%, 28% and 15% less than overtaking on the right.
Highlights
Non-lane-based driving behavior can be seen in developing countries, such as Iran, extensively
It was attempted to work on the non-lane-based behavior of Iranian drivers by collecting data in two ways: external recording, shooting traffic flow, and internal recording
Time headway and lateral distance showed that drivers, who tend to the right or overtake on the right, use sharper steering angle and keep less safety margin of lateral distance with the leader car
Summary
Non-lane-based driving behavior can be seen in developing countries, such as Iran, extensively This behavior can interrupt the traffic flow. Non-lane-based driving behavior is important by considering traffic flow and safety aspects. In this paper the relationship between the frequency of happening non-lane-based car-following and macroscopic characteristics of traffic flow will be estimated. Microscopic data will be studied to know how it happens It can illuminate whether the non-lane-based behavior is an intrinsic behavior of Iranian drivers. In other words, it shows that obeying rules and orders is not important for the drivers or non-lane-based car-following is due to environmental conditions and drivers' personal experiences. Sections seven and eight are devoted to discussion and conclusion
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call