SPATIAL AND TEMPORAL ANALYSIS OF FOG AND ITS IMPACTS ON ROAD TRANSPORTATION

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HABIBI NOUKHANDAN M.

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Journal: GEOGRAPHICAL RESEARCH Year:2005 | Volume:20 | Issue:1(76) Page(s): 19-37

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Title

SPATIAL AND TEMPORAL ANALYSIS OF FOG AND ITS IMPACTS ON ROAD TRANSPORTATION

Author(s)

HABIBI NOUKHANDAN M. | Issue Writer Certificate

Keywords

WEATHER HAZARDSQ2

FOGQ3

SPATIALQ4

AND TEMPERATURE ROAD ACCIDENTSQ3

CRISIS THERSHOLDSQ4

Abstract

Iran has a specific kind of climate due to its geographical location and some effective factors like topography and distance trom water bodies. Most of the country is covered by mountain ranges of Alborz and Zagros and some sparse mountains in the interior parts. Most of the roads pass through these mountainous areas. There are 237 dangerous and snow prone passes. Many of these passes are blocked during cold months by heavy snowfalls, avalanches, blizzards, black ice and dense FOGs. This causes considerable damage to the economy of the country. Some of the main aspects of WEATHER HAZARDS which cause some unpleasant driving conditions are rainfall, snowfall, frost, FOG and storm. Snowfall and frost usually are more dangerous than FOG but their occurrence probability can be predicted and they can be controlled by some equipment such as snowplows and salt spreaders. Wind forecast is usually exact too. Road dangers may be decreased locally by appropriate road designing, bridge building, wind break, etc. but the prediction of FOG is very difficult because of its SPATIAL and temporal changes. FOG is one factor of WEATHER HAZARDS which may directly affect the transportation safety. FOG, specially dense FOG, may affect the traffic and an increase in road accidents. In this paper, in order to study the impacts of weather conditions on transportation safety and determine critical thresholds, meteorological data in Iran have been analyzed. It is necessary to mention that in this research in order to simplify the application of data obtained in research centers outputs are on the basis of solar years.For the assessment of FOGy situation, first we obtained for a period of 10 years daily data for 120 synoptic station to identify critical meteorological & climate for the roads according to some thresholds.Working on visibility data (less than 1000 m) of the above mentioned synoptic stations provided a background to determine SPATIAL & temporal distribution of vulnerable spots.According to the results of visibility data; Khuzestan, Ardebil, and Sistan & Baluchestan provinces were the most vulnerable regions.Finally with the increasing trend of motor vehicles and traffic, there is a strong need to plan more and better roads, and we believe that study of road meteorology is very important in this regard.

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APA: Copy

HABIBI NOUKHANDAN, M.. (2005). SPATIAL AND TEMPORAL ANALYSIS OF FOG AND ITS IMPACTS ON ROAD TRANSPORTATION. GEOGRAPHICAL RESEARCH, 20(1(76)), 19-37. SID. https://sid.ir/paper/29917/en

Vancouver: Copy

HABIBI NOUKHANDAN M.. SPATIAL AND TEMPORAL ANALYSIS OF FOG AND ITS IMPACTS ON ROAD TRANSPORTATION. GEOGRAPHICAL RESEARCH[Internet]. 2005;20(1(76)):19-37. Available from: https://sid.ir/paper/29917/en

IEEE: Copy

M. HABIBI NOUKHANDAN, “SPATIAL AND TEMPORAL ANALYSIS OF FOG AND ITS IMPACTS ON ROAD TRANSPORTATION,” GEOGRAPHICAL RESEARCH, vol. 20, no. 1(76), pp. 19–37, 2005, [Online]. Available: https://sid.ir/paper/29917/en

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