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Citation |
Zwahlen HT, Schnell T. Transp. Res. Rec. 1995; 1495: 117-127. |
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Copyright |
(Copyright © 1995, 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 |
Three independent field studies investigating the nighttime detection distances of yellow and white-painted and taped pavement markings of varying widths under low-beam illumination were undertaken. Different centerline and edge line configurations, typically used on highways, were tested. The objective of Study 1 was to obtain exploratory pavement marking visibility field data for detecting the begin and end of a continuous pavement marking line as a function of line width, material, color, and lateral position of the line. Study 2 was conducted to determine the visibility distance of the onset of a left or a right curve (244-m radius) along a tangent section marked with a continuous white taped edge line placed at approximately 1.83 m to the right of the car, as a function of line width. Study 3 was conducted to determine the detection distances for the begin and end of yellow taped pavement marking configurations having different widths, placed on the left side of the vehicle representing a typical centerline on a two-lane rural highway. The results of Study 1 indicate no statistically significant differences (alpha = 0.05) for the average begin or end detection distances using a line width between 0.1 and 0.2 m. The results for Study 2 indicate that there is a statistically significant difference in the average detection distance (alpha = 0.05) between a 0.1- and a 0.2-m-wide right edge line for a left curve. The results of Study 3 indicate that the double solid line configuration provides statistically significant (alpha = 0.05) longer average detection distances when compared with the other configurations for all three widths (0.05, 0.1, and 0.2 m). Overall in Study 3, the end detection distances were significantly (alpha = 0.05) longer than the begin detection distances. Language: en |
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Keywords |
Traffic signs; Visibility; Street lighting; Pavements; Highway traffic control |