Driving speed management of high-grade highway under disastrous weather condition;

Relationship between main disastrous weather and solar activity in Nanchong;

The kinds,causes,distribution in time and space of the disastrous weather in Bohai Area areemphatically analyzed in this thesis.

Based on the discussion of the function and components of road management system for accident prevention under hazardous weather,the frame of this system has been constructed.

Bases on the statistical materials of traffic accident on the freeways,this paper analyzes the impacts and characteristics of the disaster weather on freeway transportation in Xinjiang.

To directly understand the situations of strong wind and huge waves may be encountered in the future while evaluating the safety of future route,a disaster weather avoiding and optimal sailing route selection system was proposed.

Studies of the formation and development mechanism of the slantwise convection are critical to forecasting and warning of severe weathers,such as frontal precipitation,rainstorm,blizzard,typhoon,squall line,burst cyclone and so on.

Basing automation weather station(aws) data,using the methods of database programming and C++ Builder,a severe weather warning operational system was designed.