Evaluation of Overhead Sign Background Materials and Mercury Vapor Sign Lights PDF Download
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Author: H. Dexter Jones
Publisher:
ISBN:
Category : Traffic signs and signals
Languages : en
Pages : 132
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Book Description
Verhead Guide Signs can be illuminated to sufficient target value and uniformity with certain 100 watt mercury vapor lighting units. Coating materials based on thermal setting polyester, and thermal setting polyvinylidene fluoride have been found to be satisfactory coating materials for Overhead Guide Signs. Preliminary field evaluations and legibility studies indicate that approximately 40% of the Overhead Guide Signs in the State would not require illumination if the legend is reflective.
Author: H. Dexter Jones
Publisher:
ISBN:
Category : Traffic signs and signals
Languages : en
Pages : 132
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Book Description
Verhead Guide Signs can be illuminated to sufficient target value and uniformity with certain 100 watt mercury vapor lighting units. Coating materials based on thermal setting polyester, and thermal setting polyvinylidene fluoride have been found to be satisfactory coating materials for Overhead Guide Signs. Preliminary field evaluations and legibility studies indicate that approximately 40% of the Overhead Guide Signs in the State would not require illumination if the legend is reflective.
Author:
Publisher:
ISBN:
Category : Highway research
Languages : en
Pages : 830
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Author:
Publisher:
ISBN:
Category : Traffic safety
Languages : en
Pages :
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Author: Jonathan Everett Upchurch
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 108
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Book Description
The study objective was to identify a lighting system which has a lower power cost and reduced maintenance requirements and which provides adequately for motorists' needs in terms of legibility and illumination level. Twenty-five candidate lighting systems were identified through a review of technical data and specifications for lamps and fixtures by an independent lighting expert. Photometric tests and computer analyses of sign illumination levels reduced the number of candidates to ten alternative systems which were then field tested. Each alternative lighting system was tested for 10 to 14 months. Sign luminance was measured with a telephotometer. Power consumption was monitored. Maintenance requirements and lamp life were noted. A human factors study determined legibility distance and rated viewing comfort, lighting uniformity, and color rendition. An economic analysis was performed which considered the initial cost of acquiring and installing the lighting systems and annual costs for electric power, washing, relamping, and ballast replacement. A lighting system using the high pressure sodium light source was recommended. Compared to the existing commonly used fluorescent system, it uses one-third as much electric power and has about one-third of the annual owning and operating cost. The recommended system has a satisfactory illumination level and provides the best legibility distance of the ten systems tested.
Author: Norman Bryan
Publisher:
ISBN:
Category :
Languages : en
Pages : 54
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Author: United States. Federal Highway Administration. Implementation Division
Publisher:
ISBN:
Category : Traffic signs and signals
Languages : en
Pages : 58
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Combined state studies: Arkansas State Highway and Transportation Dept., Florida Dept. of Transportation, Kentucky Dept. of Transportation, and Federal Highway Administration.
Author:
Publisher:
ISBN:
Category : Highway research
Languages : en
Pages : 640
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Author: H. Dexter Jones
Publisher:
ISBN:
Category : Traffic signs and signals
Languages : en
Pages : 202
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Author: United States. Federal Highway Administration
Publisher:
ISBN:
Category : Highway research
Languages : en
Pages : 958
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Author: Donald A. Gordon
Publisher:
ISBN:
Category :
Languages : en
Pages : 104
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