Showing papers on "Traffic wave published in 1989"

Freeway control and incident detection using a stochastic continuum theory of traffic flow

Abstract: A continuum model for freeway traffic flow is considered which contains a relaxation to equilibrium speed in anticipation of traffic change downstream. By including fluctuations the traffic flow model allows one to calculate speed distributions and derive early warning criteria. Sensor specification for traffic data acquisition on the basis of the derived incident detection and the equipment of a traffic control center are described

Managing traffic congestion in combined freeway and traffic signal networks

Abstract: An overview is provided of the modelling approach of Integration-1 (which deals specifically with integrated networks), and discusses and illustrates its features for dealing with traffic congestion problems using a typical model simulation run. Integration-1 consists of a discrete simulation that traces the path of each vehicle throughout the network. The links that a vehicle utilizes are selected in accordance with its estimate of the best route, and, along its path, each vehicle's route is further adjusted in view of any changes in the prevailing traffic congestion and traffic controls. Not only does this model allow a more detailed examination of certain strategies in isolation, such as critical intersection control, realtime control, or improved driver information systems, but it also allows the complex interactions to be studied simultaneously. Integration-1 is a research tool and requires a significant amount of further development.

Time-varying conditions and their effect on dynamic traffic assignment models

Abstract: This paper demonstrates the interaction between incident induced congestion, drivers' departure time and route choice, and the effect of available traffic information. It is found that traffic information levels and assumptions relating to travelers' route departure time selection process, significantly impact the spatial and temporal distribution of traffic.

Introduction of consious factors into the traffic flow theory

Abstract: Speed and its fluctuations in traffic flow are significant factors investigatingroad traffic conditions and traffic flow stability.This paper describes a new model of the traffic flow.The following conclusions were developed.1) The regular fluctuation of speed can be modelled by introducing human consious factors into the car-following model.2) It has proposed a new concept of time-allowance connection between two cars on the basic of speed observation at a fixed point.3) A new model of the speed distribution which is consideringthe regular fluctuation has proposed.