[SOLVED] Camera severly jittering

I have a project in which the terrain has lots of trees, lots of detail meshes and post processing applied is on the camera. It is kind of a racing game that I am making. The camera appears to severely jitter on this terrain, however if I import the car prefab, apply the scripts and everything on a completely fresh and plain terrain in another scene, there isn't even a hint of jitter.

Why does this happen and how do I solve it? Please help!

Car Controller script:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 public class CarController : MonoBehaviour
 {
     public Rigidbody sphereRB;
     public float speed;
     public float rotateForce;
     public LayerMask groundLayer;
     bool isCarGrounded;
     float moveInput;
     void Start ()
     {
         sphereRB.transform.parent = null;
     }
     void Update ()
     {
         moveInput = Input.GetAxisRaw("Vertical");
         moveInput *= speed;
         Debug.Log(moveInput);
         transform.position = sphereRB.transform.position;
         if (Input.GetAxis("Vertical") != 0 && Input.GetAxis("Horizontal") != 0)
         {
             foreach( TrailRenderer trail in GetComponentsInChildren<TrailRenderer>())
             {
                 trail.emitting = true;
             }
         } else
         {
             foreach (TrailRenderer trail in GetComponentsInChildren<TrailRenderer>())
             {
                 trail.emitting = false;
             }
         }
     }
     void FixedUpdate ()
     {
         RaycastHit hit;
         isCarGrounded = Physics.Raycast(transform.position, -transform.up, out hit, groundLayer);
         transform.rotation = Quaternion.FromToRotation(transform.up, hit.normal) * transform.rotation;
         if (isCarGrounded)
         {
             sphereRB.transform.Rotate(0f, rotateForce * Input.GetAxis("Horizontal"), 0f);
             transform.Rotate(0f, rotateForce * Input.GetAxis("Horizontal") * Input.GetAxis("Vertical"), 0f);
             sphereRB.AddForce(transform.forward * moveInput, ForceMode.Acceleration);
         }
     }
 }

Camera follow script:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 public class CameraFollow : MonoBehaviour
 {
     public Transform camPosTarget;
     public Transform camLookTarget;
     void FixedUpdate()
     {
         transform.LookAt(camLookTarget);
         transform.position = Vector3.Lerp(transform.position, camPosTarget.position, 10f * Time.deltaTime);
     }
 }