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原文传递 Culvert Management Systems. Alabama, Maryland, Minnesota, and Shelby County. Transportation Asset Management Case Studies.

题名：	Culvert Management Systems. Alabama, Maryland, Minnesota, and Shelby County. Transportation Asset Management Case Studies.
关键词：	highways, transportation departments, case studies, maryland, minnesota
摘要：	State and local DOTs are responsible for a large number of highway assets. Many of these assets, such as bridges and pavements, are highly visible and have dedicated management systems. Highway agencies also have many less noticeable structures, such as culverts, that tend to go ignored until a catastrophic failure occurs. Unfortunately, several catastrophic failures have occurred across the United States, emphasizing the need for a culvert management system (CMS). Some States have utilized the CMS program developed by FHWA, while other States have created in-house programs to meet the specific needs of their area. By taking a proactive role in managing culverts, States are preserving their investment in the transportation infrastructure and providing a safer roadway for the traveling public. Maryland, Minnesota, Alabama, and Shelby County (located in Alabama) use different methods to manage their culverts. This study explores their methods and offers information to agencies seeking new approaches to culvert management. Maryland has divided the responsibility for its culverts based on size. Large culverts are the responsibility of Marylands bridge unit, while small culverts are under the auspices of the States roadway unit. Although Maryland no longer utilizes Pontis (a comprehensive bridge management system (BMS) tool), it applies the condition ratings from Pontis to its own in-house CMS for large culverts. Maryland has also developed a risk-based approach to selecting which structures receive priority for inspections, which helps to reduce inspection costs. For the smaller structures, the roadway unit uses a separate in-house inspection and rating system that incorporates geographic information system (GIS) tools. Like Maryland, the Minnesota DOT divides the responsibility for its culverts between the bridge hydraulics unit and the roadway unit based on the size of the culverts. However, unlike Maryland, Minnesota uses Pontis along with element-level condition ratings to manage the larger culverts. The bridge hydraulics unit has developed an in-house GIS-based program called HYDINFRA, which is used for culverts and other types of drainage features, such as drop inlets. The bridge hydraulics unit has also developed an inspection guide complete with condition rating language for use with HYDINFRA. In Alabama, the DOTs maintenance bureau manages the States culverts, and maintenance personnel inspect these structures on an as-needed basis. The current maintenance management system is scheduled to be updated in the near future, which could provide an excellent opportunity to develop an in-house system or commence use of a formal CMS. / Availability Note: Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA.
总页数：	u0807；40p
报告类型：	科技报告