title: How can i make my vehicle decrease speed when not accerelating
body: <p>Here is my code that moves the car:</p>
  <pre><code>using UnityEngine;  
  
  public class CarWheelControls : MonoBehaviour {
      [SerializeField] WheelCollider frontRight;
      [SerializeField] WheelCollider frontLeft;
      [SerializeField] WheelCollider BackRight;
      [SerializeField] WheelCollider BackLeft;
      [SerializeField] Transform frontRightTransform;
      [SerializeField] Transform frontLeftTransform;
      [SerializeField] Transform backRightTransform;
      [SerializeField] Transform backLeftTransform;
  
      public float accerelation = 500f;
      public float breakingForce = 300f;
      public float maxTurnAngle = 15f;
  
      private float currentAccerelation = 0f;
      private float currentBreakForce = 0f;
      private float currentTurnAngle = 0f;
  
      private void FixedUpdate(){
          //Forward/Reverse acceleration
          currentAccerelation = accerelation * Input.GetAxis(&quot;Vertical&quot;);
  
          //pressing &quot;space&quot; gives currentBreakingForce a value
          if (Input.GetKey(KeyCode.Space))
              currentBreakForce = breakingForce;
          else
              currentBreakForce = 0f;
  
          // Apply accerelation on all wheels. Change to front wheel or rear 
          // wheel drive by deleting fronts or rears :)
          frontRight.motorTorque = currentAccerelation;
          frontLeft.motorTorque = currentAccerelation;
          BackRight.motorTorque = currentAccerelation;
          BackLeft.motorTorque = currentAccerelation;
  
          //Wheel stopping
          frontRight.brakeTorque = currentBreakForce;
          frontRight.brakeTorque = currentBreakForce;
          BackRight.brakeTorque = currentBreakForce;
          BackLeft.brakeTorque = currentBreakForce;
  
          //Steering
          currentTurnAngle = maxTurnAngle * Input.GetAxis(&quot;Horizontal&quot;);
          frontLeft.steerAngle = currentTurnAngle;
          frontRight.steerAngle = currentTurnAngle;
  
          //Wheel turning
          UpdateWheel(frontLeft, frontLeftTransform);
          UpdateWheel(frontRight, frontRightTransform);
          UpdateWheel(BackLeft, backLeftTransform);
          UpdateWheel(BackRight, backRightTransform);
      
      }
  
      void UpdateWheel(WheelCollider col, Transform trans){
          //Wheel collider state
          Vector3 position;
          Quaternion rotation;
          col.GetWorldPose(out position, out rotation);
  
          //Set wheel angle
          trans.position = position;
          trans.rotation = rotation;
  
      }
  </code></pre>
  <p>I would like it to decrease speed when I'm not accelerating, but I can't figure out how to do it.</p>