LogInGet some tips from Prototype Everything.
A game developer known as Prototype Everything showcased their custom vehicle AI system in Unity, which makes a car turn and follow a target, following the Ackermann principle, a "geometric configuration that allows both front wheels to be steered at the appropriate angle to avoid tyre sliding."
The developer notes that it's "surprisingly easy" to get a vehicle in Unity to "redirect itself toward a target it can't reach by steering alone."
Using the method they describe in the video, you can check if a target is reachable via steering only.
"If the target lies within the turn circle, it becomes mathematically unreachable – no matter how far the wheels turn. Unless the vehicle drifts, collides, or is otherwise influenced externally, it simply cannot reach that point."
To solve this, the AI logic triggers an automatic reverse mode: "the car shifts into reverse, turns the steering in the opposite direction, and pulls the target point out of the unreachable zone. Once the target is outside the turn radius, the vehicle resumes normal forward driving."
Prototype Everything wrote the logic in C# and tested it with Unity’s URP using real-time physics, vector math, and custom steering algorithms.
If you want to see what other solutions the developer provides, check out their YouTube and Reddit.
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