One-sided gradient

...For automobiles, it is desirable for the road to have a shape that is in accordance with the topography and geology, with gentle curves and slopes, but as mentioned above, there are often restrictions in terms of construction costs, maintenance, land use, and the environment. (1) Curve radius and one-sided slope When a vehicle is on a curve, it is pushed outward by centrifugal force. This is prevented by the friction between the tires and the road surface and by tilting the road surface inward (this is called the one-sided slope). In this case, the relationship between the design speed v _D (m/s), the curve radius R (m), and the one-sided slope i is expressed as follows: ...

*Some of the terminology explanations that mention "one-sided gradient" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…地形･地質に応じた形状をとり，曲線部は緩やかに曲がり，坂も緩やかにするのが自動車の走行上は望ましいが，前述のように建設費，維持管理，土地利用，環境などの面から制約を受ける場合も多い。(1)曲線半径と片こう配　自動車は曲線部では遠心力により外側に押し出される力を受ける。タイヤと路面の間の摩擦力や路面を内側に傾けて(これを片こう配という)これを防ぐが，このときの設計速度v_D(m/s)，曲線半径R(m)，片こう配iの間の関係は，で表される。…

※「片こう配」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報