Aiming at contradictory expense relationship between highway charging system and vehicle waiting services,reasonably design and control highway charging system,analyze optimum service rate in charging system,establish queuing model and infer equation of higher degree for optimum service rate.Estimate the initial value by utilizing MATLAB fitting function curve graph,adopt Netwon iterative method to solve the equation,i.e.optimum service rate in charging system,thus solving the contradiction of expenses between highway charging system and vehicle waiting service so as to minimum the sum consumed.Combining with the practice,discuss the most economic and reasonable service rate in queue of M / M /1 / ∞ / ∞ / FCFS.The result shows that the practicality of this method is strong and the accuracy is high.

To examine impact of used asphalt on road usage performance of inorganic binder,cold recyle stable material,the paper analyzes composition of materials on original road according to testing indexes stipulated in test rules for inorganic binder,stable material,and preliminarily analyzes the performance of asphalt in cold recycle material by means of tentative study of unconfined compressive strength and splitting strength of some types of cold recycle materials in different proportioning and standard stabilized macadams in same proportioning.

This text analyses the disease of expressway cutting slope,combines the perennial manage experience,puts forward the measure of treatment how to solve the disease of the expressway cutting slope.

The paper introduces the quality control methods and results achieved in construction of cement-stabilized steel slag pavement base.