عنوان مقاله [English]
نویسندگان [English]چکیده [English]
Climatic factor and atmospheric phenomenas are the most effective factors on
transportation safety, and frost is most dangerous between them. It was used climatic
conditions Matrix for temporal and spatial study frost phenomenas on Sanandaj-
Hamadan Road. In this regard, it was collected and analyzed 3 temperature,
precipitation and relative humidity daily data parameter of Sanandaj, Hamadan and
Ghorveh Synoptic Stations.
Based on climatic conditions, N5 Atmospheric Situation and N6 are dangerous
condition for vehicle and transportation safety with concentrating Janiuary (9 days),
Febrvary (5 days) and December (4 days) on Sanandaj- Hamadan Road. The start of
regional frost is late of September and March is ended, but hazardous frost for road
safety is December.