Car goes way beyond the speed limit even though the script already assigned the current speed just to reach the speed limit

Will somebody help me in my problem? I already prepared the car with Colliders, the Rigidbody, and I followed a tutorial (Link: https://youtu.be/Z4HA8zJhGEk - "Simple Car Controller in Unity Tutorial") for scripting the car. I also got the speed of the car in the script, determined the maximum speed of the car by searching it in Google, and added a few modifications to the script. Here now lies the problem: the car goes way beyond the maximum speed although the maximum speed is set and I already putted the codes that I found from https://answers.unity.com/questions/1040591/how-to-set-speed-limit-of-car.html and https://answers.unity.com/questions/1067097/car-speed-limit-unity5.html onto the script. What could I have done wrong in my script so that this will happen? Here is the code: using System.Collections; using System.Collections.Generic; using UnityEngine;

public class CarController2 : MonoBehaviour { private const string HORIZONTAL = "Horizontal"; private const string VERTICAL = "Vertical";

 public Rigidbody m_Rigidbody;
 public float torque;
 private Vector3 m_EulerAngleVelocity;

 private float horizontalInput;
 private float verticalInput;
 private float currentsteerAngle;
 private float currentbreakForce;
 private float timeCount;
 private bool isBreaking;

 [SerializeField] private float motorPower;
 [SerializeField] private float breakForce;
 [SerializeField] private float accelerationRate;
 [SerializeField] private float currentSpeed;
 [SerializeField] private float maxSpeed = 195;
 [SerializeField] private float maxSteerAngle;

 [SerializeField] private WheelCollider frontLeftWheelCollider;
 [SerializeField] private WheelCollider frontRightWheelCollider;
 [SerializeField] private WheelCollider rearLeftWheelCollider;
 [SerializeField] private WheelCollider rearRightWheelCollider;

 [SerializeField] private Transform frontLeftWheelTransform;
 [SerializeField] private Transform frontRightWheelTransform;
 [SerializeField] private Transform rearLeftWheelTransform;
 [SerializeField] private Transform rearRightWheelTransform;

 private void Start()
 {
     m_Rigidbody = GetComponent<Rigidbody>();
 }

 private void FixedUpdate()
 {
     GetInput();
     HandleMotor();
     HandleSteering();
     UpdateWheels();
     CarTurn();
     SpeedOfCar();
 }

 private void GetInput()
 {
     horizontalInput = Input.GetAxis(HORIZONTAL);
     verticalInput = Input.GetAxis(VERTICAL);
     isBreaking = Input.GetKey(KeyCode.Space);
     if (Input.GetKey(KeyCode.Space))
     {
         Debug.Log("You hitted the brakes.");
     }
 }

 private void HandleMotor()
 {
     rearLeftWheelCollider.motorTorque = verticalInput * motorPower;
     rearRightWheelCollider.motorTorque = verticalInput * motorPower;
     currentbreakForce = isBreaking ? breakForce : 0f;
     ApplyBreaking();
 }

 private void ApplyBreaking()
 {
     frontLeftWheelCollider.brakeTorque = currentbreakForce;
     frontRightWheelCollider.brakeTorque = currentbreakForce;
     rearLeftWheelCollider.brakeTorque = currentbreakForce;
     rearRightWheelCollider.brakeTorque = currentbreakForce;
 }

 private void HandleSteering()
 {
     currentsteerAngle = maxSteerAngle * horizontalInput;
     frontLeftWheelCollider.steerAngle = currentsteerAngle;
     frontRightWheelCollider.steerAngle = currentsteerAngle;
 }

 private void UpdateWheels()
 {
     UpdateSingleWheel(frontLeftWheelCollider, frontLeftWheelTransform);
     UpdateSingleWheel(frontRightWheelCollider, frontRightWheelTransform);
     UpdateSingleWheel(rearLeftWheelCollider, rearLeftWheelTransform);
     UpdateSingleWheel(rearRightWheelCollider, rearRightWheelTransform);
 }

 private void UpdateSingleWheel(WheelCollider wheelCollider, Transform wheelTransform)
 {
     Vector3 pos;
     Quaternion rot;
     wheelCollider.GetWorldPose(out pos, out rot);
     wheelTransform.rotation = rot;
     wheelTransform.position = pos;
 }

 private void CarTurn()
 {

     float turn = Input.GetAxis("Horizontal");
     m_Rigidbody.AddTorque(transform.up * torque * turn);
 }

 private void SpeedOfCar()
 {
     currentSpeed = m_Rigidbody.velocity.magnitude*3.6f;
     currentSpeed = Mathf.Round(currentSpeed);
     accelerationRate = maxSpeed/16.7f;
     accelerationRate = Mathf.Round(accelerationRate);

     if(currentSpeed <= 195){
         for(int i = 0; i < 4; i++) { rearLeftWheelCollider.motorTorque = verticalInput * motorPower; }
         for(int i = 0; i < 4; i++) { rearRightWheelCollider.motorTorque = verticalInput * motorPower; }
     }
     else { 
         for(int i = 0; i < 4; i++) { rearLeftWheelCollider.motorTorque = 0; }
         for(int i = 0; i < 4; i++) { rearRightWheelCollider.motorTorque = 0; }
     }
 }

}