| 摘要 |
PROBLEM TO BE SOLVED: To provide a road shape data creation method for creating road shape data required for executing curve vehicle speed control that gives a driver a slight sense of incongruity and to provide the same. SOLUTION: Data on a plurality of positions (node points) Nd[n] on a road is acquired, and the degree of curvature Rc[n] of the road in each node point Nd[n] is calculated. A constant curvature degree section Cr# of a curve is identified on the basis of the variation of the degree of curvature in relation to the advancement in a point corresponding to the position data, and a constant degree of curvature Rm# and an end position Pe# of the constant curvature degree section Cr# are determined. The shape of a gentle curve section Eu# that connects two adjacent constant curvature degree sections Cr# with each other is calculated on the basis of the end position Pe# of each of the two constant curvature degree sections Cr# on the sides on which the same connect with the gentle curve section Eu# and the constant curvature degree Rm# of each of the two constant curvature degree sections Cr#. As road shape data, the data regarding a constant curvature degree section having the maximum degree of curvature in the curve is created and provided. COPYRIGHT: (C)2011,JPO&INPIT
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