@otduet Seems like you're really close! Any chance you can maintain the removed state for some period of time or frames once a car is detected. You appear to be getting false negatives.
@cbeauche@googledevs Assets/GoogleARCore/SDK/Scripts/Editor/BuildHelper.cs(33,18): error CS0535: `GoogleARCoreInternal.BuildHelper’ does not implement interface member `UnityEditor.Build.IPreprocessBuild.OnPreprocessBuild(UnityEditor.BuildTarget, string)’