United States Department of Transportation
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TRIS Online Accession Number:00928051
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Edition:Final Report
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Abstract:The New Hampshire Department of Transportation (NHDOT) first conducted a Rock Cut Hazard Survey in 1975, which included 182 rock cuts. The program has evolved since 1975, and now incorporates 380 rock cuts and four different Rock Fall Hazard Rating Systems. By utilizing New Hampshire's State Planning and Research funding, a research project was initiated to investigate combining new rock cut data with pre-existing data into a Geographic Information System (GIS). Rock cut point features were collected for every rock cut with a Global Positioning System (GPS) and were added as a data layer on top of existing data coverage available through the NHDOT's GIS server. A relational database was developed which would store all the rock cut data and be linked to the GIS through a structured query language connect statement. A Brunton compass was used to collect rock cut structural data and a digital camera was used to photograph every rock cut. The structural data were graphically represented in the GIS in the form of rose diagrams, stereonets and density plots. A laser profiler was used to collect two-dimensional profiles on selected rock cuts so rock fall simulations could be conducted. The GIS does have limitations, which include: the network bandwidth, accessibility restrictions, and resource allocation for maintaining current and accurate data.
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