To describe the pavement load on the expressway, based on toll data, this paper analyzes the time and space distribution of the axle load spectrum for different vehicle types and different axle-wheel types. It studies the distribution of overload rate and overload weight for all kinds of axle-wheel types. It researches the growth rules of traffic volume and axle load. Results show that the axle load spectrum is basically same in the same direction and very different in the different directions on the Jinghu expressway, and axle load distribution of each day is similar to the one of a year. Since the Jinghu expressway was opened to traffic, the overload rate is very high and the rate is similar over the years. During the process of pavement design and maintenance, using the growth rate of traffic volume instead of that of equivalent single axle loads can lead to large errors.
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