Table 1: Equivalent definitions for understeer, neutral steer, and oversteer of a complex vehicle.

At a constant radiusOversteer 𝑑 ( 𝛿 𝑙 / 𝑅 ) / 𝑑 𝑎 𝑦 | 𝑅 = 𝑅 𝑐 < 0 𝜕 𝛿 / 𝜕 𝑉 < 0
Neutral steer 𝑑 ( 𝛿 𝑙 / 𝑅 ) / 𝑑 𝑎 𝑦 | 𝑅 = 𝑅 𝑐 = 0 𝜕 𝛿 / 𝜕 𝑉 = 0
Understeer 𝑑 ( 𝛿 𝑙 / 𝑅 ) / 𝑑 𝑎 𝑦 | 𝑅 = 𝑅 𝑐 > 0 𝜕 𝛿 / 𝜕 𝑉 > 0

At a constant velocityOversteer 𝑑 ( 𝛿 𝑙 / 𝑅 ) / 𝑑 𝑎 𝑦 | 𝑉 = 𝑉 𝑐 < 0 𝜕 𝛿 / 𝜕 ( 𝑙 / 𝑅 ) < 0
Neutral steer 𝑑 ( 𝛿 𝑙 / 𝑅 ) / 𝑑 𝑎 𝑦 | 𝑉 = 𝑉 𝑐 = 0 𝜕 𝛿 / 𝜕 ( 𝑙 / 𝑅 ) = 0
Understeer 𝑑 ( 𝛿 𝑙 / 𝑅 ) / 𝑑 𝑎 𝑦 | 𝑉 = 𝑉 𝑐 > 0 𝜕 𝛿 / 𝜕 ( 𝑙 / 𝑅 ) > 0