By means of particular analyzing and comparing with the structure, control, features and application on different solutions of particle volume metering and weight metering, the authors have given out some suggestions on how to choose the metering and controlling schemes.

It describes the variations of train weight, speed and density before and after the train speed increased on the four main lines of Beijing- Guangzhou, Beijing- Shanghai, Beijing- Harbin and Lanzhou -Lianyungang and puts forward the imagination for future development.