Patent ID: 8751107

Claim:
A vehicle wherein at a time when the vehicle travels at a predetermined vehicle speed while minute steering is carried out: relative movement of the road is expressed as flow lines, and a shape of a boundary line between a forward view in a forward field of vision of a driver and a vehicle structural part that blocks a lower end of the forward view are formed so as to be parallel or substantially parallel to a curve that has been generated by a processor based on a mathematical representation of a velocity of the forward view in the forward field of vision of the driver by making the flow lines continuous, and the curve is expressed by the following function: y 2 =Ax 2+2 Bx+C where x is a depression angle, y is an azimuth angle, A is a constant expressed by a sum of a ratio of a distance between a viewpoint height and a roll axis with respect to the viewpoint height and a reciprocal of a product of a roll rate and the viewpoint height, B is a constant expressed by a reciprocal of the roll rate, and C is a constant expressed by the constant A, the constant B and a depression angle of a sight-line direction of a driver.