kääntösäteitä

Kääntösäteitä refers to the turning radius of a vehicle. It is the radius of the smallest circle that the vehicle can complete a turn within. This measurement is crucial for determining a vehicle's maneuverability, especially in tight spaces like city streets or parking lots.

There are two main types of turning radii: the curb-to-curb turning radius and the wall-to-wall turning radius. The curb-to-curb turning radius is measured from the center of the turning circle to the outermost point of the vehicle, assuming it is turning around a curb. The wall-to-wall turning radius is a more practical measure, accounting for the extra space needed to clear obstacles on either side of the vehicle during a turn.

A smaller turning radius generally indicates better maneuverability. Factors influencing a vehicle's turning radius include its wheelbase (the distance between the front and rear axles), the width of its track (the distance between the wheels on the same axle), and the angle at which the front wheels can turn. Larger vehicles, such as trucks and buses, typically have larger turning radii than smaller vehicles like cars. Understanding a vehicle's turning radius is important for safe operation and efficient navigation.