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- W2326110907 abstract "The preferred procedure for guardrail installation in the State of Georgia includes a layer of asphalt (usually referred to as a “mow strip”) placed to retard vegetation growth around the guardrail. The objective of this multi-phase research program is to develop effective alternatives to post installation methods that incorporate a leave-out around the post. The work described in this report represents Phase I of the overall research effort. The research team evaluated the structural performance of guardrail posts installed in accordance with current GDOT (Georgia Department of Transportation) procedures that include an asphalt mow strip, as well as alternative installation options developed in conjunction with GDOT personnel. The current state of practice related to the use of asphalt vegetation barriers in the United States was identified through on a nationwide survey. An experimental program was carried out in accordance with applicable American Association of State Highway and Transportation Officials (AASHTO) guidelines. In parallel with the experimental program, a three dimensional finite element model was developed for a guardrail post installed through an asphalt layer. Results from the experimental program and finite element analyses were used to develop a series of quantitative criteria to evaluate the performance of the various post/mow strip configurations. Parametric studies were conducted on pertinent geometric variables in terms of the quantitative performance criteria. The results of this Phase I research program demonstrate that (1) there are potential combinations of mow strip thickness and rear distance that are likely to result in satisfactory dynamic performance, and (2) two techniques appear effective in reducing the ground-level restraint imparted by a mow strip on a guardrail system: decreasing the mow strip rear distance behind the post, and pre-cutting the mow strip in the region behind the post." @default.
- W2326110907 created "2016-06-24" @default.
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- W2326110907 date "2015-12-04" @default.
- W2326110907 modified "2023-09-22" @default.
- W2326110907 title "Evaluating the Performance of Guardrail Systems for Installation in Georgia by Driving Through Asphalt Layers" @default.
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