The Applicability of High Intensity Sheeting on Overhead Highway Signs PDF Download
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Author: R. N. Robertson Publisher: ISBN: Category : Lettering Languages : en Pages : 30
Book Description
This report summarizes (1) the findings of a research study on the applicability of using high intensity reflective sheeting on overhead signs, and (2) the implementation of recommendations evolving from these findings through elimination of the illumination on many overhead signs in Virginia. A survey was conducted to determine the percentage of overhead signs meeting the criteria, developed in the research, under which the illumination could be eliminated if they were refurbished with high intensity sheeting, and the plans of several proposed projects were reviewed to obtain an estimate of the percentage of signs on which lighting could be eliminated through the use of the high intensity material. Also, data were collected relative to the installation, energy and maintenance costs for lighting overhead signs. The study concluded that the illumination could be eliminated on approximately 45% of the existing signs and 50% of the proposed signs through the use of high intensity reflective materials. The benefits anticipated from the implementation of the program include enormous money and energy savings, a significant reduction in the exposure of maintenance personnel to hazardous working conditions, and improved services to the motorists.
Author: R. N. Robertson Publisher: ISBN: Category : Lettering Languages : en Pages : 30
Book Description
This report summarizes (1) the findings of a research study on the applicability of using high intensity reflective sheeting on overhead signs, and (2) the implementation of recommendations evolving from these findings through elimination of the illumination on many overhead signs in Virginia. A survey was conducted to determine the percentage of overhead signs meeting the criteria, developed in the research, under which the illumination could be eliminated if they were refurbished with high intensity sheeting, and the plans of several proposed projects were reviewed to obtain an estimate of the percentage of signs on which lighting could be eliminated through the use of the high intensity material. Also, data were collected relative to the installation, energy and maintenance costs for lighting overhead signs. The study concluded that the illumination could be eliminated on approximately 45% of the existing signs and 50% of the proposed signs through the use of high intensity reflective materials. The benefits anticipated from the implementation of the program include enormous money and energy savings, a significant reduction in the exposure of maintenance personnel to hazardous working conditions, and improved services to the motorists.
Author: R. N. Robertson Publisher: ISBN: Category : Languages : en Pages : 58
Book Description
The current practice in Virginia is to reflectorize and illuminate all overhead highway signs because of their important role in the safe and orderly flow of traffic. Reflectorization is obtained by using reflective sheeting as background and legend materials, and diffuse illumination is provided on the sign surface by lighting fixtures. The performance of the high intensity sheeting has shown significant promise and the purpose of this research was to determine the feasibility of using the material on overhead highway signs without external illumination. Since sign brightness standards have not been established, a comparative technique was employed whereby the brightness of six high intensity overhead signs without illumination was compared to that of six conventional illuminated signs. All experimentation was conducted in the field under the physical and environmental conditions experienced by the highway user. Luminance measurements were made with a telephotometer at the driver's eye position of eleven conventional automobiles. A total of 5,446 luminance measurements were recorded from the travel lanes of illuminated and non-illuminated roadways. The study concluded that the unlighted high intensity signs were brighter than the lighted conventional signs for the motorist traveling on straight sections of roadways using high beam headlights. For the same motorist using low beams the luminances of the high intensity signs were not as bright as those of adjacent conventional signs. Under stream traffic conditions, the average luminances of the conventional signs were slightly higher than those of the unlighted high intensity signs, however, in many cases there were no statistical differences and the people who viewed the signs stated they preferred the high intensity sign because its uniform brightness provided better legibility. On a curved approach, where only a limited amount of light from the vehicles was projected upon the overhead signs, the brightness of the unlighted high intensity signs was not sufficient to provide the motorists with sign visibility and legibility equivalent to those obtained from the lighted conventional signs.
Author: H. Dexter Jones Publisher: 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.
Author: James A. Benson Publisher: ISBN: Category : Brightness perception Languages : en Pages : 13
Book Description
As an initial step in the establishment of guidelines for the use of high intensity sheeting on overhead signs, a pilot study was made to investigate the effect of rotation on the average nighttime brightness of signs utilizing this material. Rotation angles were chosen on the theory that the brightness will be maximum when the entrance angle is minimum. The study concluded that while the theory used was generally, rotation did not significantly improve the average night brightness on the special overhead signs evaluated.
Author: Publisher: ISBN: Category : Automobiles Languages : en Pages : 230
Book Description
Report on the activities of the National Highway Traffic Safety Administration and the Federal Highway Administration under the Highway Safety Act of 1966.
Author: R. N. Robertson
Author: R. N. Robertson
Author: R. N. Robertson
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Author: H. Dexter Jones
Author: Norman Bryan
Author: United States. National Highway Traffic Safety Administration
Author: James A. Benson
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