probably broken car controller

Assets/Scenes/AI Training.unity

@@ -202,7 +202,7 @@ MonoBehaviour:
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   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 218143925}
-  m_Enabled: 1
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   m_Name: 
@@ -245,6 +245,22 @@ PrefabInstance:
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     m_Modifications:
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+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 2883785401448142367, guid: 5851f609a58dc884a99030da0105c6db, type: 3}
+      propertyPath: m_ForwardFriction.m_Stiffness
+      value: 2
+      objectReference: {fileID: 0}
+    - target: {fileID: 2883785401448142367, guid: 5851f609a58dc884a99030da0105c6db, type: 3}
+      propertyPath: m_SidewaysFriction.m_Stiffness
+      value: 2
+      objectReference: {fileID: 0}
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       propertyPath: m_LocalPosition.x
       value: 9
@@ -289,10 +305,21 @@ PrefabInstance:
       propertyPath: m_Name
       value: Hotrod
       objectReference: {fileID: 0}
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+      value: 2
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+      value: 2
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+      addedObject: {fileID: 749736917}
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@@ -703,6 +730,29 @@ PrefabInstance:
     m_AddedGameObjects: []
     m_AddedComponents: []
   m_SourcePrefab: {fileID: 100100000, guid: 450060be716600a46927ba00fb04135b, type: 3}
+--- !u!1 &749736913 stripped
+GameObject:
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+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: 58d3a2623a4164b4bb25683edc176b03, type: 3}
+  m_Name: 
+  m_EditorClassIdentifier: 
+  motorTorque: 5000
+  brakeTorque: 20000
+  maxSpeed: 1000
+  steeringRange: 60
+  steeringRangeAtMaxSpeed: 35
+  autoBrake: 5000
 --- !u!1001 &760601908
 PrefabInstance:
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Assets/Scripts/car control v2.cs

@@ -10,6 +10,8 @@ public class carcontrolv2 : MonoBehaviour
     public float steeringRange = 30;
     public float steeringRangeAtMaxSpeed = 10;
 
+    public float autoBrake;
+
     WheelControl[] wheels;
     Rigidbody rigidBody;
 
@@ -50,6 +52,12 @@ public class carcontrolv2 : MonoBehaviour
         // as the car's velocity
         bool isAccelerating = Mathf.Sign(vInput) == Mathf.Sign(forwardSpeed);
 
+        bool isStopping = vInput == 0; // range
+
+        bool isBraking = vInput < 0 && forwardSpeed > 0;
+
+        Debug.Log(vInput);
+
         foreach (var wheel in wheels)
         {
             // Apply steering to Wheel colliders that have "Steerable" enabled
@@ -67,12 +75,19 @@ public class carcontrolv2 : MonoBehaviour
                 }
                 wheel.WheelCollider.brakeTorque = 0;
             }
-            else
+
+            if (isBraking)
+            {
+                wheel.WheelCollider.brakeTorque = Mathf.Abs(vInput) * brakeTorque;
+                //wheel.WheelCollider.motorTorque = 0;
+            }
+
+            if (isStopping)
             {
                 // If the user is trying to go in the opposite direction
                 // apply brakes to all wheels
-                wheel.WheelCollider.brakeTorque = Mathf.Abs(vInput) * brakeTorque;
-                wheel.WheelCollider.motorTorque = 0;
+                wheel.WheelCollider.brakeTorque = Mathf.Abs(vInput) * brakeTorque + autoBrake;
+                // wheel.WheelCollider.motorTorque = 0;
             }
         }
     }