Almost every Internet communication is preceded by a translation of a DNS name to an IP address. Therefore monitoring of DNS traffic can effectively extend capabilities of current methods for network traffic anomaly detection. In order to effectively monitor this traffic, we propose a new flow metering algorithm that saves resources of a flow exporter. Next, to show benefits of the DNS traffic ...

In this work, we apply the iterative learning control approach to address the traffic density control via ramp metering in a macroscopic level freeway environment. The traffic density control problem is formulated into an output tracking problem and the tracking trajectories are variable with time and iteration change. Rigorous analyses and intensive simulations show that the iterative learning...

We present in this paper a linear programming framework to address freeway control applications such as ramp metering. After showing the equivalence between the LWR model and a linear optimization problem, several extensions are introduced to model the ramp queues and the capacity drop phenomenon. A wide range of objective functions which are relevant in traffic engineering are then introduced ...

Traffic congestion is a common problem; particularly in metropolitan areas. It is especially true for the Tokyo Metropolitan Freeway (MEX) which handles about 1.2 million vehicles per day. Thirty percent of these vehicles use the MEX central circular and radial routes causing chronic traffic congestion. A traffic-control center in Japan mitigates the congestion by governing access to MEX entran...

This paper reviews theoretical and empirical literature on the measurement of the major automobile externalities, namely local pollution, global pollution, oil dependence, traffic congestion and traffic accidents. It then dicusses the rationale for traditional policies to address these externalities, including fuel taxes, fuel economy standards, emissions standards and related policies. Finally...

This study aims to determine whether ramp meters increase the capacity of active freeway bottlenecks. The traffic flow characteristics at twenty-seven active bottlenecks in the Twin Cities have been studied for seven weeks without ramp metering and seven weeks with ramp metering. A methodology for systematically identifying active freeway bottlenecks in a metropolitan area is proposed, which re...

The one of the biggest barrier that hinders Internet development is security problem caused by malicious user. In this paper, we deal with Distributed Denial of Service (DDoS) attacks that monopolize network resource, thus result in network or system congestion. Under DDoS attack, it's very difficult to provide legitimate users with their fair share of available network resource. This paper pro...

Traffic models play an important role in both today’s traffic research and in many traffic applications such as traffic flow prediction, incident detection and traffic control. In this paper we concentrate on motorway traffic models for traffic control. First, we discuss why traffic control is important for both practice and research. We also argue why a model-based approach to traffic control ...