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Evaluation of Rumble Stripe Markings.
| 题名： | Evaluation of Rumble Stripe Markings. |
| 作者： | LINDLY, J. K.; NARCI, A. |
| 关键词： | BICYCLES; HIGHWAY DESIGN; RUMBLE STRIPS |
| 摘要： | This study evaluated flat thermoplastic edge markings (FTM) and Rumble Stripes (also called edgeline rumble strips) installed on highways maintained by the Alabama Department of Transportation. The primary objectives of this evaluation were to compare service life, life-cycle costs, and wet-night visibility (measured by wet retroreflectivity) of the two edge marking types. Nighttime dry and wet retroreflectivity of sixteen one-mile segments of FTM and five, two-mile segments of Rumble Stripe were measured using a mobile retroreflectometer. The limited number of segments of Rumble Stripe represented all Rumble Stripe available at the time of testing. The average dry retroreflectivity of new FTM and new Rumble Stripe tested by this study were 320 and 236 mcd/m2/lux, respectively. However, the Rumble Stripe was found to lose dry retroreflectivity at a lower rate with respect to cumulative traffic passes. As a result, under similar ADT levels, Rumble Stripe is estimated to provide a higher dry retroreflectivity and thus a longer service life than FTM. The average wet retroreflectivity of Rumble Stripe at the beginning of its service life was found to be higher than the average wet retroreflectivity of FTM at the beginning of its life. However, a decay model for wet retroreflectivity of FTM could not be established, so the decay rate of the two types of edge lines could not be compared. The life cycle cost analysis showed that for a five-year marking service life and an eight year life cycle, the cost per mile of marking was $1,355 for FTM and $2,424 for Rumble Stripe. A literature review found that other research had revealed a high benefit: cost ratio for placing Rumble Stripes due to its crash reduction abilities. Principally due to the longer service life and potential crash reduction effects, the researchers recommend that ALDOT consider implementing rumble stripes where shoulders are constructed, reconstructed, or overlaid, and where bicyclist issues, maintenance issues, and FHWA technical requirements can be met. |
| 报告类型： | 科技报告 |
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