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Proof of Concept for prediction of Pavement Temperature: A tactical Decision Aid for Highway Safety
| 题名： | Proof of Concept for prediction of Pavement Temperature: A tactical Decision Aid for Highway Safety |
| 作者： | Edward E. Adams and Alan R. Curran |
| 关键词： | Montana, Pavement Temperature, Thermal Mapping |
| 摘要： | A thermal-mapping program dubbed WinTherm/RT; Windows based Thermal Model for Road Temperature was developed in this study The computational highway thermal map is an outgrowth of software developed for the U.S. military to determine the infra-red signature of vehicles. This concept uses planar elements of finite thickness called facets to define the geometry. The model developed in this study utilizes U.S. Geological Survey (USGS) digital elevation maps (DEM) and superimposes onto them the highway location. Thermal properties associated with the highway and landscape surrounding it can be assigned. A study plot along 1-90 on the west side of Bozeman pass was constructed in this manner. Solar zenith angle, sky view factors, surface to surface radiation exchange and shadowing are taken into account. However, the influence of shadowing in the current algorithm uses a graphical approach that is not producing satisfactory results. This is thought to be the result of the scale necessary for the terrain moving. In a follow on study this will be replaced with a ray-tracing scheme in order to address the problem. Although data acquisition from the RWIS proved problematic, sufficient information was acquired to yield very promising results. |
| 报告类型： | 科技报告 |
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