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Citation |
Campi Jr. JS. Transp. Res. Rec. 1988; 1160: 90-96. |
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Copyright |
(Copyright © 1988, Transportation Research Board, National Research Council, National Academy of Sciences USA, Publisher SAGE Publishing) |
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DOI |
unavailable |
PMID |
unavailable |
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Abstract |
This paper investigates delineating guiderails and evaluates the performance of different types of guiderail delineation under a variety of field conditions. A thorough search of literature on the topic determined that virtually no research has been conducted previously on the delineation of guiderails. A determination of the various benefits that could be passed on to the motoring public through delineation of the guiderail is discussed. The installation procedures and the labor involved for each type of delineator or delineation treatment are also discussed. The effects of soil and dirt accumulation on guiderail delineators were measured under different environmental conditions at different geographical locations. Information taken from the results of an actual behind-the-wheel driver evaluation survey revealed that motorists generally respond favorably to guiderail delineation. The selection of an appropriate device for delineating guiderails was based on various performance-related requirements that the device or reflective treatment had to meet. The criteria used for selecting a device for delineating guiderail were ease of installation, resistance to soil, durability, and cost. An improvement in the nighttime visibility of guiderails through delineation should result in a reduction in guiderail accidents, which would help to offset the initial cost of delineation. Language: en |
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Keywords |
Highway Signs, Signals and Markings; Highway Traffic Control; Transportation--Accident Prevention; Highway Systems--Guard Rails |