Journal ArticleDOI
New Stopping Sight Distance Model for Use in Highway Geometric Design
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TLDR
In this article, a new model for determining stopping sight distance requirements for geometric design of highways is presented based on parameters describing driver and vehicle capabilities that can be validated with field data and defended as safe driving behavior.Abstract:
Stopping sight distance is an important design parameter in that it defines the minimum sight distance that must be provided at all points along the highway. Thus, it influences geometric design values, construction costs, and highway safety. Stopping sight distance is defined as the sum of two components—brake reaction distance and braking distance. The basic model for calculating stopping sight distances was formalized in 1940, and the model's parameters have been altered to compensate for changes in eye height, object height, and driver behavior over the past 50 years. Recent studies, however, question whether the model's parameters and assumptions represent real-world conditions. A new model for determining stopping sight distance requirements for geometric design of highways is presented. This model is based on parameters describing driver and vehicle capabilities that can be validated with field data and defended as safe driving behavior. More than 50 drivers, 3,000 braking maneuvers, 1,000 driver e...read more
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References
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Journal Article
Stopping sight distance: can we see where we now stand?
J W Hall,D S Turner +1 more
TL;DR: Conclusions are drawn regarding the appropriateness of the current methodology and several specific recommendations are offered for additional research on this important topic.
Truck characteristics for use in highway design and operation. volume i: research report. final report
TL;DR: In this paper, the authors reviewed existing data for the truck characteristics that need to be considered in highway design, including truck dimensions, braking distance, driver eye height, acceleration capabilities, speed-maintenance capabilities on grades, turning radius and offtracking characteristics, suspension characteristics, and rollover threshold.
Journal Article
International sight distance design practices
TL;DR: The purpose of this paper is to present the sight distance design practices of a variety of countries as a resource to highway agencies in any country that may be considering possible modifications and updates to their own policies and practices.
A case for science-based road safety design and management
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