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Traffic wave

About: Traffic wave is a research topic. Over the lifetime, 2106 publications have been published within this topic receiving 62117 citations. The topic is also known as: phantom traffic jam & ghost jams.


Papers
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Journal ArticleDOI
TL;DR: A comparison of the distributions of link travel time predicted by the model with those derived from VISSIM simulation showed that travel time distributions can be predicted well under time-varying demand and different traffic conditions.
Abstract: Estimation and prediction of urban travel time are acknowledged as important yet challenging topics. The traffic flow theory as developed especially for freeway traffic does not give much help for modeling urban traffic processes. Urban travel times are irregular because of several disturbances on a path. The interruption of trips at signalized intersections causes a large part of the total delay that vehicles experience on a route. These delays vary with stochastic properties of traffic flow, including stochastic arrivals and departures at signalized intersections. As a result, a wide distribution of delay (travel times) can be found for a certain traffic condition and traffic control scheme. This paper proposes a procedure for predicting the distributions of urban link travel times. The core of this procedure is the proposed model of distributions of link travel times that considers stochastic arrivals and departures at intersections and the traffic control scheme explicitly. A comparison of the distrib...

7 citations

Proceedings ArticleDOI
01 Oct 2013
TL;DR: A new macroscopic model for traffic in freeways, the Hysteretic Cell Transmission Model (HCTM), is presented and incorporates a feature to reproduce the capacity drop phenomenon observed in real traffic.
Abstract: A new macroscopic model for traffic in freeways, the Hysteretic Cell Transmission Model (HCTM), is presented. The model is based on the Cell Transmission Model (CTM) and incorporates a feature to reproduce the capacity drop phenomenon observed in real traffic. An auxiliary dynamic state is included that induces hysteretic behavior on the density-flow relationship. The hysteresis is dependent on the time derivative of the density in a particular cell and allows to change the congested flow traffic wave velocity in the fundamental diagram and, with this, to produce a capacity drop. A Lyapunov stability analysis for a stretch of highway is presented that is compared with a similar analysis for the CTM. Simulation results show that the capacity of a congested stretch of highway is reduced when its vehicular density is decreasing.

7 citations

01 Jan 2010
TL;DR: In this article, an explanation of congested traffic in NGSIM-data in the context of the three-phase traffic theory is presented, which is explained by the nucleation-interruption effect occurring in metastable synchronized flow.
Abstract: An explanation of congested traffic in NGSIM-data in the context of the three-phase traffic theory is presented. Complex spatiotemporal dynamics of moving jams observed in NGSIM-data is explained in three-phase traffic theory by the nucleation-interruption effect occurring in metastable synchronized flow. The nucleation-interruption effect in metastable synchronized flow is associated with the dual role of lane changing in the synchronized flow as well as with the vehicle merging from on-ramps onto the main road and from the main road to off-ramps. The dual role of lane changing is as follows: lane changing can lead either to the occurrence of a growing moving jam or to the jam dissolution in metastable synchronized flow.

7 citations

Proceedings ArticleDOI
19 Sep 1996
TL;DR: It is shown that widening the beam width for more than 40/spl deg/ does not produce appreciable gains in the network performance, and effects of traffic density on the performance of the multi-hopping network is examined.
Abstract: The exchange of data among vehicles can decrease the likelihood of accidents and improve freeway capacity. The relaying of data between vehicles which are not directly able to communicate via a third party (multi-hopping of data) further improves the capabilities of inter-vehicle communication. In this paper a multi-lane multi-hop moving vehicle system is examined. The improvement of multi-hopped systems over single hopped systems is shown. Recently there has been an interest in multi-hop for solving problems of narrow beam systems such as communicating with vehicles to the side. The effects of widening the beam width is examined. It is shown that widening the beam width for more than 40/spl deg/ does not produce appreciable gains in the network performance. Effects of traffic density on the performance of the multi-hopping network is also examined in two traffic situations: a free flowing traffic situation and a traffic jam situation.

7 citations

Journal ArticleDOI
TL;DR: A multi-speed and two-lane cellular automata model of traffic flow was proposed to simulate the main road traffic in city under the open boundary condi tions and can reflect the traffic flow of the main-road in cityunder the control of the traffic lights.
Abstract: A multi-speed and two-lane cellular automata model of traffic flow was proposed to simulate the main road traffic in city under the open boundary condi tions. By considering many real factors, the effects on traffic flow and velocit y of the main-road, produced by the bus stop and the time switched between the green light and the red light, have been analyzed. The result can reflect the re al traffic flow of the main-road in city under the control of the traffic lights .

7 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202314
202237
202120
202017
201919
201822