Reduce steerangle at high speeds

How do i reduce the steerangle of a cars wheels in proportion to the speed? So like high steerangle at low speeds, low at high speeds?

Well I did it in my own game like:

SteerMax= 60-(speed/11); //those values are to be determined by the style of game

if (angle>SteerMax) angle=SteerMax;

collider.steerAngle = angle;