Nghiên cứu quy luận thời gian xe đến thực tế với dòng giao thông hỗn hợp trên một số tuyến đường đô thị ở Hà Nội

. Since, the arrival pattern is an important parameter to describe traffic flow. It directly affects the quality of the traffic flow, such as delay, length of queue on the road traffic network. The rules of traffic arrival pattern can be used to solve the problem of traffic operation and safety for road facilities such as intersections, tolls, or merging, diverging segments in expressways. The paper presents a study on the actual arrival pattern, particularly the study on actual time headway of vehicles on several urban streets in Ha Noi, Viet Nam. The study proposed a method for determining the actual time headway with non-lane based concept in mixed traffic conditions in Vietnam. On that basis, a field survey was conducted to collect data including geometrical factors and traffic data such as volume, vehicle composition, actual time headway on three road segments in several urban streets in Hanoi. Initially, the study focused on analyzing the traffic flow at off-peak hours. Each road segment, 1-hour period was chosen for analysis. The analysis results of headway based on the proposed arrival pattern determination method shows that the arrival headway of the mixed vehicle follows the three-parameter Log-normal distribution and depends on the traffic volume.