228 citations · 654 across the 6 of their papers we have counts for
6 papers
Macroscopic traffic models from microscopic car-following models
H. K. Lee, H. -W. Lee, D. Kim
We present a method to derive macroscopic fluid-dynamic models from microscopic car-following models via a coarse-graining procedure. The method is first demonstrated for the optim…
Phase diagram of congested traffic flow: an empirical study
H. Y. Lee, H. -W. Lee, D. Kim
We analyze traffic data from a highway section containing one effective on-ramp. Based on two criteria, local velocity variation patterns and expansion (or nonexpansion) of congest…
Empirical Phase Diagram of Congested Traffic Flow
H. Y. Lee, H. -W. Lee, D. Kim
We present an empirical phase diagram of the congested traffic flow measured on a highway section with one effective on-ramp. Through the analysis of local density-flow relations a…
Dynamic States of a Continuum Traffic Equation with On-Ramp
H. Y. Lee, H. -W. Lee, D. Kim
We study the phase diagram of the continuum traffic flow model of a highway with an on-ramp. Using an open boundary condition, traffic states and metastabilities are investigated n…
Origin of synchronized traffic flow on highways and its dynamic phase transitions
H. Y. Lee, H. -W. Lee, D. Kim
We study the traffic flow on a highway with ramps through numerical simulations of a hydrodynamic traffic flow model. It is found that the presence of the external vehicle flux thr…
Two-way traffic flow: exactly solvable model of traffic jam
H. -W. Lee, V. Popkov, D. Kim
We study completely asymmetric 2-channel exclusion processes in 1 dimension. It describes a two-way traffic flow with cars moving in opposite directions. The interchannel interacti…