Applying this rule as priori knowledge to correct the measurement data, weighing precision can be significantly improved in middle speed region.

By going deep into analyzing FHWA highway traffic noise prediction model and introducing the concepts of equivalent traffic flow and equivalent traffic speed to deal with mixed vehicles flow, a calculating model for freely spreading highway traffic noise is developed with the means of regression analysis,which deduces a model for highway traffic noise prediction.

Judging from investment of section crossover, cost of repair and maintenance, operation cost of medium-speed train, and comparison of revenue with section crossover setting plan of Jing-hu high speed railway, it can be concluded that the economic benefit of increased running medium-speed train in the space of maintenance interval is remarkable if carrying capacity is strained.

On the basis of analyzing the problems caused and brought about by high-speed trains running on the existing line and medium-speed trains on highspeed railway, the paper proposes an idea of train operation pattern and its rational realization.