Through an analysis of the advantages and shortcomings of different types of street medians, this paper identifies the green medians (raised median with green landscaping) are most suitable for the safe traveling of vehicles.

Drainage design of the central reserve on speedway;

The causes of interior accumulation of water in the central reserveon speedway are described as well as this damage to roadbed and communi-ation pipe.

The selection of afforestation species in median strip of Taiyuan-Jiuguan Expressway;

Passing lane stopping sight distance outside of median divider in freeway;

On the basis of the properties of motorcar running on passing lane,the sight point position and lateral clear distance of curve in passing lane outside the median divider in expressway are analyzed.

The development process of trough concrete barriers of expressway median divider are introduced briefly in this paper.

On the drain design of medial divider;

Study on the medial divider new style concrete safety guards and its application efficiency;

The research on the unsaturated seepage on roads' medial divider