文档介绍：García and Libreros 1
SAFETY EFFECT OF THE SKEW ANGLE IN RIGHT TURN MANEUVERS
AUTHORS:
Alfredo García Ludwing Libreros C
Professor. Polytechnic University of Valencia, PhD Candidate. Polytechnic University of
Department of Transportation. Valencia, Department of Transportation.
Camino de Vera, s/n. 46022-Valencia, Spain. Camino de Vera, s/n. 46022-Valencia, Spain.
Tel: 34-963877374, fax:34-963877379. Tel: 34-963877374, fax:34-963877379
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ABSTRACT
In a previous research, a wide range of skewed angles was verified using a static model, between
the two roads in an intersection, that could be dangerous. Simplified intersection geometries
were used, vehicle dimensions that may have influence to the lateral visibility phenomenon were
measured and sight angles from rear-view mirrors were also measured experimentally. This
research aims to take into account some dynamical variables, specially related to the drivers’
behavior, to study the right turn maneuvers within an intermediate skew angle and to study the
effect of the skew angle on safety.
Field observations of the drivers behavior, their visual scanning process and the vehicles
evolution, while right turn maneuvering, were carried out using video recording. Specific
software was developed for tracking vehicle trajectories and to register driver behavior, based on
field videos.
This research aims to relate the right turn lanes geometry with the vehicle trajectories, the
driver scanning process, and the main street traffic volume.
The information was analyzed statistically to explain the observed drivers’ behavior and
evaluate road safety criteria. Microsimulation software was developed to facilitate evaluation for
both new designs and current right turn maneuvers. This microsimulation software takes into
account the drivers' visibility limitations as well as the layout geometry.
As a geometric design criteria,