Add project files.

Assets/Scripts/BuildingSystem.meta

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Assets/Scripts/BuildingSystem/NodePlacer.cs

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+using UnityEngine;
+
+public class NodePlacer : MonoBehaviour
+{
+    [SerializeField]
+    private GameObject nodeObject;
+
+    [SerializeField]
+    private TrafficNode prevPlacedNode;
+
+
+    void Update()
+    {
+        if (Input.GetKeyDown(KeyCode.B))
+        {
+            Vector3 newPosition = Camera.main.ScreenToWorldPoint(Input.mousePosition);
+            newPosition.z = 0;
+            TrafficNode newNode = Instantiate(nodeObject, newPosition, Quaternion.identity).GetComponent<TrafficNode>();
+
+            if (prevPlacedNode != null)
+            {
+                prevPlacedNode.AddNextNode(newNode);
+
+            }
+            prevPlacedNode = newNode;
+
+        }
+    }
+}

Assets/Scripts/BuildingSystem/NodePlacer.cs.meta

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Assets/Scripts/TrafficSystem.meta

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Assets/Scripts/TrafficSystem/TrafficNode.cs

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+using System.Collections.Generic;
+using UnityEngine;
+
+public class TrafficNode : MonoBehaviour
+{
+    [SerializeField]
+    private List<TrafficNode> nextTrafficNodes;
+
+    public List<TrafficNode> GetNextTrafficNodes() { return nextTrafficNodes; }
+
+    public void AddNextNode(TrafficNode node)
+    {
+        nextTrafficNodes.Add(node);
+    }
+    private void OnDrawGizmos()
+    {
+        Gizmos.color = Color.green;
+        Gizmos.DrawSphere(transform.position, 0.2f);
+        foreach (TrafficNode node in nextTrafficNodes)
+        {
+            if (node != null)
+            {
+                Gizmos.color = Color.blue;
+                Gizmos.DrawLine(transform.position, node.transform.position);
+            }
+        }
+    }
+}

Assets/Scripts/TrafficSystem/TrafficNode.cs.meta

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Assets/Scripts/TrafficSystem/TrafficParticipant.cs

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+using UnityEngine;
+
+public class TrafficParticipant : MonoBehaviour
+{
+    [SerializeField]
+    private TrafficNode nextNode;
+
+    [SerializeField]
+    private TrafficNode currentTrafficNode;
+
+    [SerializeField]
+    private float speed = 5f;
+
+    private void Start()
+    {
+        if (nextNode == null)
+        {
+            ChooseNextNode();
+        }
+    }
+    private void Update()
+    {
+        if (nextNode != null)
+        {
+            transform.position = Vector3.MoveTowards(transform.position, nextNode.transform.position, speed * Time.deltaTime); if (transform.position == nextNode.transform.position)
+            {
+                Arrived();
+                ChooseNextNode();
+            }
+        }
+        else
+        {
+            ChooseNextNode();
+        }
+
+
+
+    }
+
+    private void Arrived()
+    {
+        Debug.Log("Arrived");
+        currentTrafficNode = nextNode;
+        nextNode = null;
+    }
+
+    private void ChooseNextNode()
+    {
+        Debug.Log("Choose next node");
+        if (nextNode == null)
+        {
+            nextNode = currentTrafficNode.GetNextTrafficNodes()[Random.Range(0, (currentTrafficNode.GetNextTrafficNodes().Count))];
+        }
+    }
+
+    private void OnDrawGizmos()
+    {
+        if (nextNode != null)
+        {
+            Gizmos.color = Color.red;
+
+            Gizmos.DrawLine(transform.position, nextNode.transform.position);
+        }
+    }
+}

Assets/Scripts/TrafficSystem/TrafficParticipant.cs.meta

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