The paper discuss about the horizontal curve of the transition curve with differed length frequently used in the design of highway and city road construction,and it also states the coordinate calculation method by using the horizontal curve basis of the transition curve with differed length.

Combining practice design work, author discusses the factor to affect gentle curve length andgentle curve length in different condition in high grade wad.

The small radius non-complete transition curve is frequently used especially in the ramp design of large-sized interchange.

Coordinate Calculation of Easement Curve Center and Side Stakes Using VB;

A constrained optimization method for deciding easement curve length in the raising operation speed of the existing railway;

Accuracy analysis of coordinating calculation of easement curve;