Abstract：By utilizing the difference between curve s arc and chord，a series nf more convenient and easily rememberable calculating formulas for railway curves are derived. It is no need of using trigonometric function table and other railway curves tables. The different essentials of curves in common use may be obtained only by simple calculations. During applying the long chord to layout the railway curves，as well as during the length of transition curve being irregular on the operating railway line，the required curve's essentials may be obtained by utilizing the formulas derived in this paper.
李本深. 曲线弧弦差的利用——线要素简便公式的推导[J]. 铁道工程学报, 2000, 17(3): 24-28.
LI Ben-shen. UTILIZATION OF DIFFERENCE BETWEEN CURVE S ARC AND CHORD DERIVATION OF CONVENIENT FORMULAS FOR ESSENTIALS OF RAILWAY CURVES. Journal of Railway Engineering Society, 2000, 17(3): 24-28.
2000, Vol. 17 
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