Author: Norman BryanPublisher:
ISBN:
Category :
Languages : en
Pages : 54
Book Description
A Limited Evaluation of Reflective and Non-reflective Background for Overhead Signs
Author: Norman BryanHighway Safety Literature
Author: Highway Safety Literature
Author: Evaluation of Overhead Sign Background Materials and Mercury Vapor Sign Lights
Author: H. Dexter JonesPublisher:
ISBN:
Category : Traffic signs and signals
Languages : en
Pages : 132
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.
Night Visibility of Overhead Guide Signs: a Review of the Literature. Final Report
Author: Donald A. GordonEvaluation of Guide Sign Construction Material
Author: H. Dexter JonesPublisher:
ISBN:
Category : Traffic signs and signals
Languages : en
Pages : 202
Book Description
Night Visibility of Overhead Guide Signs
Author: Donald A. GordonPublisher:
ISBN:
Category : Automobile driving at night
Languages : en
Pages : 108
Book Description
Considers adequacy of proposed guidelines which will eliminate illumination and the use of reflective sign backgrounds in highway guide signs.
Evaluation of Alternative Lighting Systems for Guide Sign Illumination
Author: Jonathan Everett UpchurchPublisher:
ISBN:
Category : Roads
Languages : en
Pages : 108
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.
Traffic Engineering Handbook
Author: James L. PlinePublisher: Prentice Hall
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 504
Book Description
A reference work offering information on the basic principles and the proven techniques of traffic engineering.
SRIM Index
Author: Publisher:
ISBN:
Category : Computer programming
Languages : en
Pages : 686
Book Description