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针对我国公路网络还没有功能方面的划分及合理配里，根据交通网络具有自相似性的特点，将结点集上的网络，按其功能分出五种；五个层次的网络中，都存在着上述的五种功能结构，结点的稳定性决定着网络的德定性.本文通过组合归并法，得出实际应用上的会路功能级别的划分标准；将功能级别划分为两个层面，进而通过图上作业法求出我国国家层面上主干线奋路、干线公路、集散奋路、出入道路的总里程；各功能级别线路的比重结构；主要功能级别的线路在东、中、西部的分布；以分维数a为基础，讨论东、中、西部的差异，指出这种差异的含义，利用主干线、干线与高速公路的关系，推算出我国高速公路的总里程.

Research on Function and Configuration of Highway Network--A Method Based on Merged Combination

Most highway network shave not been classified from the viewpoint of its function. The paper divides the knots into five levels according to its functions based on the self-similarity of transportation networks. The stability of knots determines the stability of the network. The method of combination merges is used to get the demarcation standard of the classes of highway function. The functions are classified into two levels as stated in the paper. The mileage of the main highway on national level of our country is obtained by the diagram method. The paper also gathers the total mileage of highway, the specific weight construction of the circuit of each function class and the circuit of the main function class in the east and west region. With the analytical parameter of a, the difference between the east and the west regions is discussed and the meaning of this kind of difference is also pointed out. Making use of the relation among the main highway, the highway and freeway, the paper finally concludes the total mileage of the freeway required for national economic development.