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VISIBILITY OF NEW CENTERLINE AND EDGE LINE PAVEMENT MARKINGS.
| 题名： | VISIBILITY OF NEW CENTERLINE AND EDGE LINE PAVEMENT MARKINGS. |
| 作者： | Zwahlen-HT; Schnell-T |
| 关键词： | NIGHT-VISIBILITY; CENTERLINE-; EDGE-MARKINGS; YELLOW-; WHITE-; CONFIGURATIONS-; WIDTHS-; RETROREFLECTIVITY- |
| 摘要： | The objective of the presented two-part study was to provide nighttime pavement-marking visibility data obtained under automobile low-beam illumination conditions in the field for further calibration of the Ohio University pavement-marking visibility model CARVE (Computer Aided Road Marking Visibility Evaluator). A total of 10 subjects participated in Part 1 of the study. The goal of Part 1 was to determine the end-detection distance of finite-length, new, medium-retroreflectivity, yellow pavement marking tape centerlines without edge lines as a function of the centerline configuration (single dashed, single solid, and double solid) and width. The results of Part 1 confirm that an increase in the average end-detection distance of about 55% represents the approximate upper limit of what can be achieved by adding more retroreflective area to a yellow centerline. Part 2 consisted of four main experiments involving 10 subjects each and two follow-up experiments involving a total of 10 subjects. The goal of Part 2 was to provide pavement-marking end-detection distance data for fully marked roads consisting of left and right white edge lines with either a yellow double solid or single dashed centerline. The main effects of width, retroreflectivity, and centerline configuration were found to be statistically significant. A fully marked road consisting of both edge lines and a centerline generally appears to provide end-detection distances that are on average about twice as long as the end-detection distances that can be achieved with a centerline alone, without edge lines. |
| 总页数： | Transportation Research Record. 1997. (1605) pp49-61 (9 Fig., 5 Tab., 11 Ref.) |
| 报告类型： | 科技报告 |
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