Author: John A. Molino
Publisher:
ISBN:
Category : Traffic signs and signals
Languages : en
Pages : 0
Book Description
Photometric measurements of the daytime chromaticity and luminance of retroreflective sign materials were made both in the laboratory and in the field. These instrument measurements were compared with daytime perceptual judgments of color properties made by human observers in the field. Hue, saturation, and brightness were determined for four different types of retroreflective sheeting materials and one diffuse material at four quadrants of each color area for six different colors specified in the Code of Federal Regulations for use on street and highway traffic control signs. Overall, participants' responses aligned well with the instrument measurements. The introduction of retroreflective properties reduced both the apparent saturation and the brightness of all the colors. The results for the white, green, and blue color areas showed distinct color separations for retroreflective sign materials. The results for the red, orange, and yellow areas showed less color separation but little overlap among contiguous colors in the perceptual color space. This outcome has implications for determining the shape and size of the color areas used to specify the colors that may be employed on traffic control signs. While the present color areas seem to adequately support the daytime perception of the color of retroreflective sign materials for the six colors tested, special attention needs to be paid to the red/orange and orange/yellow color boundaries in any future revisions to the Federal Highway Administration (FHWA) color areas. The results of the present experiment indicate that there is no pressing need to modify the FHWA color areas, but improvements might be made in future iterations so as to enhance separation of those color areas that are more difficult to discriminate.
Daytime Color Appearance of Retroreflective Traffic Control Sign Materials
Author: John A. Molino
Publisher:
ISBN:
Category : Traffic signs and signals
Languages : en
Pages : 0
Book Description
Photometric measurements of the daytime chromaticity and luminance of retroreflective sign materials were made both in the laboratory and in the field. These instrument measurements were compared with daytime perceptual judgments of color properties made by human observers in the field. Hue, saturation, and brightness were determined for four different types of retroreflective sheeting materials and one diffuse material at four quadrants of each color area for six different colors specified in the Code of Federal Regulations for use on street and highway traffic control signs. Overall, participants' responses aligned well with the instrument measurements. The introduction of retroreflective properties reduced both the apparent saturation and the brightness of all the colors. The results for the white, green, and blue color areas showed distinct color separations for retroreflective sign materials. The results for the red, orange, and yellow areas showed less color separation but little overlap among contiguous colors in the perceptual color space. This outcome has implications for determining the shape and size of the color areas used to specify the colors that may be employed on traffic control signs. While the present color areas seem to adequately support the daytime perception of the color of retroreflective sign materials for the six colors tested, special attention needs to be paid to the red/orange and orange/yellow color boundaries in any future revisions to the Federal Highway Administration (FHWA) color areas. The results of the present experiment indicate that there is no pressing need to modify the FHWA color areas, but improvements might be made in future iterations so as to enhance separation of those color areas that are more difficult to discriminate.
Publisher:
ISBN:
Category : Traffic signs and signals
Languages : en
Pages : 0
Book Description
Photometric measurements of the daytime chromaticity and luminance of retroreflective sign materials were made both in the laboratory and in the field. These instrument measurements were compared with daytime perceptual judgments of color properties made by human observers in the field. Hue, saturation, and brightness were determined for four different types of retroreflective sheeting materials and one diffuse material at four quadrants of each color area for six different colors specified in the Code of Federal Regulations for use on street and highway traffic control signs. Overall, participants' responses aligned well with the instrument measurements. The introduction of retroreflective properties reduced both the apparent saturation and the brightness of all the colors. The results for the white, green, and blue color areas showed distinct color separations for retroreflective sign materials. The results for the red, orange, and yellow areas showed less color separation but little overlap among contiguous colors in the perceptual color space. This outcome has implications for determining the shape and size of the color areas used to specify the colors that may be employed on traffic control signs. While the present color areas seem to adequately support the daytime perception of the color of retroreflective sign materials for the six colors tested, special attention needs to be paid to the red/orange and orange/yellow color boundaries in any future revisions to the Federal Highway Administration (FHWA) color areas. The results of the present experiment indicate that there is no pressing need to modify the FHWA color areas, but improvements might be made in future iterations so as to enhance separation of those color areas that are more difficult to discriminate.
Daytime Color Appearance of Retroreflective Traffic Control Sign Materials
Author:
Publisher:
ISBN:
Category : Traffic signs and signals
Languages : en
Pages : 65
Book Description
Photometric measurements of the daytime chromaticity and luminance of retroreflective sign materials were made both in the laboratory and in the field. These instrument measurements were compared with daytime perceptual judgments of color properties made by human observers in the field. Hue, saturation, and brightness were determined for four different types of retroreflective sheeting materials and one diffuse material at four quadrants of each color area for six different colors specified in the Code of Federal Regulations for use on street and highway traffic control signs. Overall, participants' responses aligned well with the instrument measurements. The introduction of retroreflective properties reduced both the apparent saturation and the brightness of all the colors. The results for the white, green, and blue color areas showed distinct color separations for retroreflective sign materials. The results for the red, orange, and yellow areas showed less color separation but little overlap among contiguous colors in the perceptual color space. This outcome has implications for determining the shape and size of the color areas used to specify the colors that may be employed on traffic control signs. While the present color areas seem to adequately support the daytime perception of the color of retroreflective sign materials for the six colors tested, special attention needs to be paid to the red/orange and orange/yellow color boundaries in any future revisions to the Federal Highway Administration (FHWA) color areas. The results of the present experiment indicate that there is no pressing need to modify the FHWA color areas, but improvements might be made in future iterations so as to enhance separation of those color areas that are more difficult to discriminate.
Publisher:
ISBN:
Category : Traffic signs and signals
Languages : en
Pages : 65
Book Description
Photometric measurements of the daytime chromaticity and luminance of retroreflective sign materials were made both in the laboratory and in the field. These instrument measurements were compared with daytime perceptual judgments of color properties made by human observers in the field. Hue, saturation, and brightness were determined for four different types of retroreflective sheeting materials and one diffuse material at four quadrants of each color area for six different colors specified in the Code of Federal Regulations for use on street and highway traffic control signs. Overall, participants' responses aligned well with the instrument measurements. The introduction of retroreflective properties reduced both the apparent saturation and the brightness of all the colors. The results for the white, green, and blue color areas showed distinct color separations for retroreflective sign materials. The results for the red, orange, and yellow areas showed less color separation but little overlap among contiguous colors in the perceptual color space. This outcome has implications for determining the shape and size of the color areas used to specify the colors that may be employed on traffic control signs. While the present color areas seem to adequately support the daytime perception of the color of retroreflective sign materials for the six colors tested, special attention needs to be paid to the red/orange and orange/yellow color boundaries in any future revisions to the Federal Highway Administration (FHWA) color areas. The results of the present experiment indicate that there is no pressing need to modify the FHWA color areas, but improvements might be made in future iterations so as to enhance separation of those color areas that are more difficult to discriminate.
Instrumental Colorimetry of Retroreflective Sign Materials
Author: I. Nimeroff
Publisher:
ISBN:
Category : Colorimetry
Languages : en
Pages : 104
Book Description
Publisher:
ISBN:
Category : Colorimetry
Languages : en
Pages : 104
Book Description
Instrumental Colorimetry of Retroreflective Sign Materials. Final Report
Author: I. Nimeroff
Publisher:
ISBN:
Category : Traffic signs and signals
Languages : en
Pages : 94
Book Description
Publisher:
ISBN:
Category : Traffic signs and signals
Languages : en
Pages : 94
Book Description
Instrumental Color Measurement of Retroreflective Highway Sign Materials. Final Report
Author: Isadore Nimeroff
Publisher:
ISBN:
Category : Reflective materials
Languages : en
Pages : 44
Book Description
The colorimetric properties of seventy-four samples of retroreflective highway sign materials were obtained at NBS by visual measurements outdoors using five observers having normal color vision, and by three photoelectric tristimulus colorimeters and a recording spectrophotometer. Cooperative measurements by two industrial color laboratories are also reported.
Publisher:
ISBN:
Category : Reflective materials
Languages : en
Pages : 44
Book Description
The colorimetric properties of seventy-four samples of retroreflective highway sign materials were obtained at NBS by visual measurements outdoors using five observers having normal color vision, and by three photoelectric tristimulus colorimeters and a recording spectrophotometer. Cooperative measurements by two industrial color laboratories are also reported.
Implementation Strategies for Sign Retroreflectivity Standards
Author: Kent L. Black
Publisher: Transportation Research Board
ISBN: 9780309048699
Category : Transportation
Languages : en
Pages : 60
Book Description
Publisher: Transportation Research Board
ISBN: 9780309048699
Category : Transportation
Languages : en
Pages : 60
Book Description
Emergency Vehicle Visibility and Conspicuity Study
Federal Register
Author:
Publisher:
ISBN:
Category : Delegated legislation
Languages : en
Pages : 2674
Book Description
Publisher:
ISBN:
Category : Delegated legislation
Languages : en
Pages : 2674
Book Description
Roadside Design Guide
Author: American Association of State Highway and Transportation Officials. Task Force for Roadside Safety
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 560
Book Description
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 560
Book Description