As a result of great traction current and rail-ground leakage resistance in the section of high speed and heavy load electric railway,the higher rail potential can have dangerous effect to persons and equipments.

Numerical solutions to the line contact thermoelastohydrodynamic lubrication problem and internal stresses at the subsurface with respect to high viscosity and low viscosity oils, respectively, under high speed and extremely heavy load, have been obtained based on our previous work on the thermoelasto hydrodynamic lubrication of the sliding surfaces with zero entrainment velocity.

Furthermore,the engineering experiment was carried out with the lubricant used in the high-speed and over-loading bearings of hydraulic vibrator.

With system analysis method the goal analysis and game procedures were discussed about the government to determine the upper and lower boundary of the toll rate from the macroscopic angle,about the corporations to decide,construct and manage heavy-load freeways,about the heavy-load vehicles owners to select the paths and the heavy-load amounts.