Characteristics of traffic flow at nonsignalized T-shaped intersection with U-turn movements.

TitleCharacteristics of traffic flow at nonsignalized T-shaped intersection with U-turn movements.
Publication TypeJournal Article
Year of Publication2013
AuthorsFan H-Q, Jia B, Li X-G, Tian J-F, Yan X-D
JournalTheScientificWorldJournal
Volume2013
Pagination856416
Date Published2013
Abstract

Most nonsignalized T-shaped intersections permit U-turn movements, which make the traffic conditions of intersection complex. In this paper, a new cellular automaton (CA) model is proposed to characterize the traffic flow at the intersection of this type. In present CA model, new rules are designed to avoid the conflicts among different directional vehicles and eliminate the gridlock. Two kinds of performance measures (i.e., flux and average control delay) for intersection are compared. The impacts of U-turn movements are analyzed under different initial conditions. Simulation results demonstrate that (i) the average control delay is more practical than flux in measuring the performance of intersection, (ii) U-turn movements increase the range and degree of high congestion, and (iii) U-turn movements on the different direction of main road have asymmetrical influences on the traffic conditions of intersection.

DOI10.1084/jem.20130212
Alternate JournalScientificWorldJournal