HoHCI-BikeSteering/Assets/Scripts/Roads/StraightRoadExtras.cs

using System;
using Pools;
using UnityEngine;

namespace Roads
{
   public class StraightRoadExtras : MonoBehaviour
   {
      public GameObject arcPrefab;
      private GameObject arc;

      private bool hasArc;

      public void ShowArc()
      {
         arc = Instantiate(arcPrefab, transform);
         hasArc = arc != null;
      }

      private void OnTriggerExit(Collider other)
      {
         if (hasArc && other.CompareTag("bike"))
         {
            Destroy(arc);
         }
      }
   }
}