关键词: 公路运输；货运换乘；最优路径；Python 语言

Abstract: At present, freight enterprises mainly adopt direct transportation. However, with the improvement of the requirements of the consignee on the supply chain, the existing transportation mode limits the development of the freight enterprises. In order to make full use of the existing highway transportation capacity, this paper studies the freight transportation path problem under the transfer mode, and expands the scope of transportation radiation. In order to solve this problem, this paper establishes a mathematical model aiming at the shortest transit time of all goods, and designs the corresponding algorithm. Finally, combined with the case data, the paper uses Python language to solve the transportation time of goods and get the optimal transportation path. It effectively reduces the transit time of road freight transportation, effectively reduces the cost of freight companies, and reduces the carbon emissions of trucks while meeting the needs of consignees.

Key words: Road transportation; Freight transfer; Optimal path; Python language