Car movement & camera switch

using UnityEngine;

public class PlayerController : MonoBehaviour
{
    [SerializeField] float speed = 15.0f;
    [SerializeField] float turnSpeed = 35.0f;
    private float horizontalInput;
    private float forwardInput;

    //camera switch
    public Camera mainCamera;
    public Camera hoodCamera;
    public KeyCode switchKey;

    //2 player
    public string inputID;

    void FixedUpdate()
    {
        //player input
        //control left/right movement
        horizontalInput = Input.GetAxis("Horizontal" + inputID);
        //control forward and back movement
        forwardInput = Input.GetAxis("Vertical" + inputID);

        //Move the vehicle forward
        transform.Translate(Vector3.forward * Time.deltaTime * speed * forwardInput);
        //have vehicle rotate as it turns
        transform.Rotate(Vector3.up * Time.deltaTime * turnSpeed * horizontalInput);

        if (Input.GetKeyDown(switchKey))
        {
            mainCamera.enabled = !mainCamera.enabled;
            hoodCamera.enabled = !hoodCamera.enabled;
        }
    }
}