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Guidelines for Minimum Signal Sight Distance
Transportation Research Record: Journal of the Transportation Research Board, 2007The guidelines for minimum visibility distance in the 2003 Manual on Uniform Traffic Control Devices (MUTCD) are based on a research model developed in 1977, a portion of which was based on stopping sight distance concepts from 1965. Since then, roadway design criteria, vehicle performance characteristics, and driver characteristics have changed. These
Naveen Mokkapati, H. Gene Hawkins
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Safety Analysis on Road Sight Distance
2008 International Conference on Intelligent Computation Technology and Automation (ICICTA), 2008The drivers are supposed to have sufficient distance in order to watch for the changes of the surroundings before cars such as traffic conditions, highway alignments, scenery design and so on, and to take the corresponding actions to ensure driving safely.
Hang Zhang, Yun Huang, Ke Deng
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Modeling of Required Preview Sight Distance
Journal of Transportation Engineering, 2000Poor coordination of horizontal and vertical alignments can create locations where the available sight distance drops below the required sight distance. Therefore, current design guides have recommended a number of guidelines to enhance the alignment coordination.
Y. Hassan, S. M. Easa
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Stopping Sight Distance and Horizontal Sight Line Offsets at Horizontal Curves
Transportation Research Record: Journal of the Transportation Research Board, 2014Criteria for the design of horizontal curves implicitly rely on design speed to produce safe and efficient designs, particularly for horizontal sight line offsets and stopping sight distances. Current design guidance provides a method for calculating minimum horizontal sight line offsets that is accurate and valid only when both driver and object are ...
Jonathan S. Wood, Eric T. Donnell
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Sighting ocular dominance magnitude varies with test distance
Clinical and Experimental Optometry, 2018Ocular dominance can be defined as the preference of an individual for viewing with one eye over the other for particular visual tasks. It is relevant to monovision contact lens wear, cataract surgery and sports vision. Clinically, the measurement of ocular dominance is typically done at an arbitrary distance using a sighting test, such as the hole-in ...
Raymond, Ho +3 more
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GIS-Based System for Sight Distance Analysis of Highways
Journal of Computing in Civil Engineering, 2014Analyzing the distance visible to a driver on a highway is important for traffic safety, especially in manoeuvres such as emergency stops, when passing another vehicle, or when vehicles cross at intersections. Software that calculates highway distances visible to a driver has been developed. This software is supported by a geographic information system
María Castro +3 more
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On the Focal Distance of the Eye during Sighting in Pistol Shooting
Perceptual and Motor Skills, 1995We measured the focal distance and pupil diameter of the eyes of 11 marksmen sighting a pistol target at 23 m distance. Based upon the focal distance and pupil diameter of the subjects, we estimated the point at which they were looking during sighting. Calculation based on depth of field which can be derived from the pupil diameter of 4.5 mm suggested ...
H, Ishigaki, H, Edagawa, M, Miyao
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Distance Estimation by Blindfolded Sighted Participants Using Echolocation
Perception, 2019Auditory perceived distance can be distorted in one’s internal representation. Thus, the present study examined whether blindfolded sighted participants could reduce the bias and preserve estimated distance for 5 to 15 s using echolocation. The participants performed a delayed reproduction task that consisted of testing sessions on 2 separate days in ...
Tomoki Maezawa, Jun I Kawahara
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Sight Distance for Disabled Pedestrians at Crossings
Transportation Research Record: Journal of the Transportation Research Board, 2013When crossing at and near intersections and bends with restricted visibility, pedestrians, particularly disabled people, need to estimate safe gaps in vehicular traffic, as is typically required when they cross straight highway segments. Restricted-visibility crossings occur in urban areas and in rural places such as trail crossings where horizontal or
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Student Understanding of Sight Distance in Geometric Design
Transportation Research Record: Journal of the Transportation Research Board, 2010Although many students demonstrate considerable aptitude in manipulating equations and variables within academic environments, research consistently shows that they lack conceptual understanding; the deficit accounts for their difficulties in choosing appropriate equations or understanding the basic phenomena that undergird such equations.
Brock Andrews +3 more
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