By the study of automobile s headlight scatter angle,standard cross-section of tunnel and driving rule in tunnel,the different characteristics of vehicle s turning right and left,this paper work out helix line development s minimum radius of horizontal curve in freeway tunnel under different design speeds.

In the railway network planning, effective information for the project decision can not be provided, because it is hard to get the expanding coefficient.

In this paper, the circuit line development form was presented, which could provide guidance for similar joint design.

The masterpieces in every period were wriffen by the authors,such as JIA Yi,ZHANG heng,who came from Henan or MEI Cheng,SIMA Xiang ru,who lived in Henan,the works are combined together,We can see a clear developing clue just like a beaufiful picture,in the style of Fu in Han Dynasty.