reconstruction value. According to the official information released by Gaozhou Municipal People's Government, the section of provincial highway 388 from Yuntan, Gaozhou to the urban area was rebuilt according to the design of two-way four-lane first-class highway, with the numerical design speed of 8km/h, the subgrade width of 26.m and the total length of the route of about 4 km. Gaozhou City, a county-level city managed by Maoming City, Guangdong Province, China, is located in the southwest of Guangdong Province and the middle of Maoming City, with an area of 3,274.6 square kilometers. Gaozhou City is a mountainous city with mountainous terrain, high in the northeast and low in the southwest, and belongs to the south subtropical monsoon climate.