| 摘要 |
PROBLEM TO BE SOLVED: To enable a driver to easily and surely grasp curve information in the front of a vehicle and to improve the driving capacity of the vehicle by detecting the existence of at least one curve on a road in front of the vehicle and displaying curved direction information and difficulty information on a visual display or the like prior to entrance into the curve. SOLUTION: When the curve state of a curved road is recognized based on information from a navigation system 50 and the radium R of curvature of the curved road is calculated, a curvature change judging part 108 computes a change in the radius R of curvature on one curved road and judges whether the radius R of curvature is a curve to be gradually increased and moderated or a curve to be gradually reduced and sharpened. An R difficulty judging part 110 judges the difficulty of the radius R of curvature, i.e., whether the radius R is large or not and the manipulated variable of a turned hundle is small or not, based on the calculated radius-of-curvacture information on the curved road. A display/voice guide output part 106 outputs the information on a change in curvature, R difficulty, etc., to a voice guiding device 70. |
