详情

原文传递 Crash Attenuator Usage along Travelways and in Work Zones

题名：	Crash Attenuator Usage along Travelways and in Work Zones
作者：	Burkett, G.; Bennett, D. A.; Ravani, B.
关键词：	Crash attenuator##Work zones##Highway maintenance##Life cycle cost##Highway crashes##In-service models##Cost savings##Methodology application##Caltrans##California##
摘要：	The goal of this research is to develop a methodology for computation of expected in-service life cycle costs dor highway crash attenuators placed alongside of highways. Since crash attenuators are designed to be hit, logically their in-service costs should be take into consideration in addition to their initial cost in their selection. A methodology that would allow calculation of the life cycle cost of crash attenuators at the time of their selection can lead to significant long term cost savings for Caltrans Maintenance. the research question addressed in this research is can a formula or methodology be developed to all ow the computation of the life cycle cost of crash attenuators atthe time of their initial selection. Attenuator in-service maintenance costs are comprised of a series of difficult to quantify factors with dependent and complex inter-associations. These fundamental relationships need to be identified and characterized with a formal and rigorous analysis. The Scope of this study is limited to Caltrans approved and deployed attenuators and their associated in-service maintenance costs on California highways. The in-service costs are solely derived from Caltrans sources and processed in respect to Caltrans procedures and operations. The resulting methodology and formula developed in this study was circulated to appropriate State, Federal and industry representatives in an effort to acquire reviews and suggestions. The comments received were incorporated into this report and reflected in the final form of the methodology. This research has determined that two of the most important site attributes influencing life cycle costs of crash attenuators are the expected impact frequency and the access factor. For highway sites with elevated values of either of these factors, in-service maintenance costs becomes the compelling consideration and products designed for cost-effective reset/repair are preferred. This study identifies and describes a class of severe duty attenuators developed expressly to enable simple reset/repair after impacts and based on the methodology, quantifies the expected site specific cost savings. The final objective of this research is to provide Caltrans traffic designers a means to identify and justify the selection of the most appropriated attenuators product designs for a given site based on its unique attributes.
总页数：	59
报告类型：	科技报告