What is the weather that has the greatest impact on the expressway?

The roads are icy, red warning signal.

When the road surface temperature is lower than 0℃, precipitation occurs, and road icing that has a great influence on traffic may occur or has occurred within 2 hours.

Road icing has a great influence on traffic. Suggestion:

1. Traffic, public security and other departments should do a good job in road icing emergency and rescue;

2. Traffic, public security and other departments should pay attention to directing and guiding vehicles, and close icy road traffic when necessary;

3. Personnel should go out as little as possible.

Historical early warning

The Meteorological Observatory of Shijiazhuang City, Hebei Province continued to issue the road icing red warning signal at 9: 00 on June165438+1October 65438. Affected by the previous snowfall, there are still road icing phenomena in some sections of Shijiazhuang from tonight to tomorrow morning; In the afternoon, the road is slippery, so pay attention to traffic safety. At 06: 05 on June 6, 2009, Xingtai Meteorological Observatory continued to release the blizzard red warning signal: At present, the snowfall in most counties and cities in Xingtai has reached more than 15 mm, the urban area is 27 mm, and the snow depth in most counties and cities is more than 10 cm. It is expected that there will still be heavy snow tonight, and the snowfall will gradually weaken during the day tomorrow. Please take preventive measures. On February 26th, 2009, Lanzhou Central Meteorological Observatory issued the red warning signal of Gansu road icing to remind relevant departments to pay attention to traffic safety. The red warning of road icing issued by Lanzhou Central Meteorological Observatory shows that in the past two days, moderate to heavy snow has appeared in Lanzhou, Linxia, Dingxi, Pingliang, Qingyang, Gannan, Tianshui, Baiyin and other cities and counties in Gansu Province, and the snowfall will continue in the future 12 hour. It is expected that road icing will occur in most sections of the above cities and counties, which will have a significant impact on traffic. Relevant departments should take preventive measures, especially the traffic and public security departments should do a good job in road icing emergency work. On February 2, 2008, Zhejiang Meteorological Observatory issued the red warning signal on road icing again on the afternoon of February 2, 2008, suggesting that traffic, public security and other departments should do a good job in road icing emergency and rescue, direct and guide vehicles, close icy road traffic if necessary, and minimize people going out. From February/KLOC-0 to February 2, heavy snow fell in the mountainous areas of north-central Zhejiang Province and south Zhejiang Province. By noon on the 2nd, a large-scale snowstorm in Zhejiang had lasted for 30 hours, and the depth of snow in most areas exceeded local records. The thickness of snow in Hangzhou Station has reached 3 1 cm, exceeding the historical maximum of 29 cm since meteorological records. In addition, the thickness of snow in Hangzhou, Huzhou and Changxing stations exceeded 30 cm, all exceeding the historical maximum. In addition, 9 stations including Pinghu, Haining, Haiyan, Xiaoshan, Shaoxing, Shangyu, Cixi, Longyou and Changshan were flat or broke the historical record. The Zhejiang Meteorological Observatory predicts that from the evening of February 2, except for moderate to heavy snow in southern Ningbo and northern Taizhou, snowfall in other areas will continue to weaken. On February 3, the province will be dominated by cloudy to cloudy weather. It is estimated that on the morning of the 3 rd, the lowest temperature in the mountainous area of northwestern Zhejiang will be MINUS 4 degrees Celsius to MINUS 6 degrees Celsius, which will be severely frozen; It's freezing from minus 2 degrees Celsius to minus 4 degrees Celsius in northern Zhejiang. Snow and road icing will have a serious impact on transportation, electricity, communications, agriculture and people's lives.