Synchronized flow and phase separations in single-lane mixed traffic flow
نویسندگان
چکیده
D PR OO F Abstract In this paper, we have studied synchronized flow and phase separations in mixed (heterogeneous) single-lane highway traffic. It is found that the flux–density (occupancy) curve of heterogeneous flow, as expected, lies in between two flux–density (occupancy) curves of homogeneous flow R 1⁄4 0 (all vehicles are slow vehicles) and R 1⁄4 1 (all vehicles are fast vehicles). However, unexpectedly, the velocity–density (occupancy) curve of heterogeneous flow does not. We also found that cross-correlation function (CCF) analysis shows that heterogeneous flow has almost the same strong coupling as homogeneous flow. In other words, when traffic is in free flow or jams, the value of CCF is approximate to be 1.0, while the value is about 0.1 in synchronized flow. r 2006 Elsevier B.V. All rights reserved.
منابع مشابه
Identifying and Analyzing Stop and Go Traffic based on Asymmetric Theory of Driving Behavior in Acceleration and Deceleration
Stop and go traffic that leads to oscillate traffic flow frequently is observed on congestion flow. Unexpected reasons such as lane – changing maneuvers, lower speeds of leader vehicle and moving bottleneck cause stop and go traffic and amplifying delay and environment impacts. Stop and go traffic exactly can’t be modeled by traffic models, and also car following models based on kinematic flow ...
متن کاملTraffic Flow Characteristics of Isolated Off-ramps in Iranian Expressways
The purpose of this study was to investigate traffic flow characteristics at off-ramp junctions in Iranian expressways. The study was conducted on the traffic behavior in isolated off-ramp vicinity of 6-lane expressways. The database consisted of traffic flow and traffic speed information extracted from videotapes. The relationship between diverging traffic flow in the right lane of expressway ...
متن کاملModeling and Simulation of Traffic Flow Using Cellular Automata
Recently, Cellular Automata (CA) models are developed and studied mostly for homogeneous traffic flow. In the current paper an attempt has been made to use CA models to study heterogeneous traffic flows which are common in real life situation. For a better representation of different types of vehicles, cell sizes have been reduced. A different set of CA rules to control the light and heavy vehi...
متن کاملLong-lived states in synchronized traffic flow: empirical prompt and dynamical trap model.
The present paper proposes an interpretation of the widely scattered states (called synchronized traffic) stimulated by Kerner's hypothesis about the existence of a multitude of metastable states in the fundamental diagram. Using single-vehicle data collected at the German highway A1, temporal velocity patterns have been analyzed to show a collection of certain fragments with approximately cons...
متن کاملA Traffic Flow Simulation Model Based on the Desired Speed in Merging Sections on Freeways
In order to alleviate traffic congestions and environmental impact, developing a model to evaluate under various geometric and traffic conditions is desirable, which is the objective of this study. The car following model describes following behaviors that drivers follow each other in the traffic stream on only one lane. The lane change model is one of the essential components of any microscopi...
متن کامل