Traffic flow control in automated highway systems (AHS) is addressed. A link layer controller for a hierarchical AHS architecture is presented. The controller proposed in this paper stabilizes the vehicular density and flow around predetermined profiles in a stretch of highway using speed and lane changes as control signals. Multiple lane highways in which vehicles have different destinations a...

This paper deals with a spatiotemporal traffic events generator for real highway networks. The goal is to use the event generator to test real-time and batch traffic analysis applications. In this context, we represent a highway network as an oriented graph based on the geographic data of the different sensors locations. The traffic is generated based on a sociocultural calendar using a virtual...

I recent years there has been a growing concern over the congested conditions of our urban highway facilities. The continuing escalation of adverse driving conditions in major urban areas has generated a feeling of discontent among automobile owners and transportation planners alike. One major factor that has contributed to this feeling of dissatisfaction is the rapid pace with which many of th...

Introduction Congestion bottlenecks are severe traffic chokepoints where demand far exceeds available highway capacity. The Federal Highway Administration (FHWA) of the US Department of Transportation states that recurring bottlenecks account for the largest share of road delay in the United States (40%), far exceeding traffic incidents (25%), inclement weather (15%), construction (10%) or othe...

In the United States, hundreds of people lose their lives each year and many more are injured due to vehicle crashes in the work zones. Over the years, temporary traffic control (TCC) measures have been developed and deployed in work zones. To continuously improve the safety, there is a need to identify the traffic control deficiencies in work zones by evaluating the effectiveness of existing T...

background: injuries and fatalities from road traffic injuries are global public health concerns, and a major problem in the iran. this study aimed to explore strategies to control road traffic injuries (rti) in iran. methods: we conducted a qualitative study to explore possible ways to reduce the occurrence of road traffic injuries in iran in 2016. interviewees were purposively sampled from va...

Hypotheses and some results of the three-phase traffic theory by the author are compared with results of the fundamental diagram approach to traffic flow theory. A critical discussion of model results about congested pattern features which have been derived within the fundamental diagram approach to traffic flow theory and modelling is made. The empirical basis of the three-phase traffic theory...

As freeway traffic is increasing in exponential rate day by day need an correct and practical methods to model and control the traffic flow.A cellular Automata (CA) is a system of finite automata that provide a discrete computational model to under the complex behaviour system. This article provides a survey on how researchers can use Cellular Automata to control the traffic on highway includin...

We study the wireless communication among highway vehicles in the newly-assigned 5.9 GHz Dedicated Short Range Communication (DSRC) spectrum. A vehicle-vehicle Location-Based Broadcast (LBB) communication protocol is designed to meet highway safety applications’ communication requirements. The analytical expressions of the performance of the protocol in terms of probability of transmission fail...

Highway construction zone safety has been a research focus inmany countries formany decades. In the United States, regardless of the research efforts devoted, highway construction zones remain a serious safety concern for government agencies, legislatures, the highway industry, and the traveling public. In this study, the fatal and injury accidents between 1992 and 2004 inKansas highway constru...