diff --git a/Assets/Scenes/SampleScene.unity b/Assets/Scenes/SampleScene.unity
index b7bc75a..cedde44 100644
--- a/Assets/Scenes/SampleScene.unity
+++ b/Assets/Scenes/SampleScene.unity
@@ -239,6 +239,7 @@
   frequency: 0.2
   frequencyVariance: 0.1
   roads: {fileID: 1714391592}
+  spawnCars: 1
 --- !u!4 &128843416
 Transform:
   m_ObjectHideFlags: 0

diff --git a/Assets/Scenes/SampleScene.unity b/Assets/Scenes/SampleScene.unity
index b7bc75a..cedde44 100644
--- a/Assets/Scenes/SampleScene.unity
+++ b/Assets/Scenes/SampleScene.unity
@@ -239,6 +239,7 @@
   frequency: 0.2
   frequencyVariance: 0.1
   roads: {fileID: 1714391592}
+  spawnCars: 1
 --- !u!4 &128843416
 Transform:
   m_ObjectHideFlags: 0
diff --git a/Assets/Scripts/CameraControl.cs b/Assets/Scripts/CameraControl.cs
index e043c87..79c8513 100644
--- a/Assets/Scripts/CameraControl.cs
+++ b/Assets/Scripts/CameraControl.cs
@@ -45,7 +45,7 @@
         float scroll = Input.GetAxis("Mouse ScrollWheel");
         if (scroll != 0.0f) {
             scale += scroll * (-scrollSpeed);
-            scale = Mathf.Clamp(scale, -2, 2);
+            scale = Mathf.Clamp(scale, -2, 4);
             float realScale = Mathf.Pow(2, scale);
             transform.localScale = new Vector3(realScale, realScale, realScale);
         }

diff --git a/Assets/Scenes/SampleScene.unity b/Assets/Scenes/SampleScene.unity
index b7bc75a..cedde44 100644
--- a/Assets/Scenes/SampleScene.unity
+++ b/Assets/Scenes/SampleScene.unity
@@ -239,6 +239,7 @@
   frequency: 0.2
   frequencyVariance: 0.1
   roads: {fileID: 1714391592}
+  spawnCars: 1
 --- !u!4 &128843416
 Transform:
   m_ObjectHideFlags: 0
diff --git a/Assets/Scripts/CameraControl.cs b/Assets/Scripts/CameraControl.cs
index e043c87..79c8513 100644
--- a/Assets/Scripts/CameraControl.cs
+++ b/Assets/Scripts/CameraControl.cs
@@ -45,7 +45,7 @@
         float scroll = Input.GetAxis("Mouse ScrollWheel");
         if (scroll != 0.0f) {
             scale += scroll * (-scrollSpeed);
-            scale = Mathf.Clamp(scale, -2, 2);
+            scale = Mathf.Clamp(scale, -2, 4);
             float realScale = Mathf.Pow(2, scale);
             transform.localScale = new Vector3(realScale, realScale, realScale);
         }
diff --git a/Assets/Scripts/Car/Car.cs b/Assets/Scripts/Car/Car.cs
index 6f80d5e..6540b77 100644
--- a/Assets/Scripts/Car/Car.cs
+++ b/Assets/Scripts/Car/Car.cs
@@ -107,7 +107,7 @@
         float otherTraveledDistance = car.speed * time;
         float currentCarDistance = thisDistance - otherDistance;
         float projectedDistance = otherTraveledDistance - otherDistance;
-        float savetyDistance = 3f + speed * 1.8f;
+        float savetyDistance = 3.5f + speed * 1.8f;
         if (currentCarDistance < 0 || currentCarDistance > car.brakingDistance + savetyDistance) {
             return false;
         }
@@ -124,7 +124,7 @@
     }
 
     private bool isBraking() {
-        float stoppingDistance = brakingDistance + 3f + 1.8f * speed + 1f;
+        float stoppingDistance = Mathf.Max(1.8f * speed, brakingDistance + speed) + 3.5f;
         Road currentRoad = road;
         float currentRoadPosition = roadPositon;
         int currentRoadIndex = roadIndex;
@@ -133,10 +133,10 @@
             currentRoadPosition += stoppingDistance / steps;
             float totalDistance = stoppingDistance / steps * i;
             while (currentRoadPosition >= currentRoad.path.length) {
-                currentRoadIndex++;
-                if (currentRoadIndex == route.roads.Count) {
+                if (currentRoadIndex == route.roads.Count - 1) {
                     goto end;
                 }
+                currentRoadIndex++;
                 currentRoadPosition -= currentRoad.path.length;
                 currentRoad = route.roads[currentRoadIndex];
             }
@@ -153,7 +153,7 @@
         }
     end:
         List<Car> carsToCheck = new List<Car>();
-        for (int i = this.roadIndex; i < this.route.roads.Count; i++) {
+        for (int i = this.roadIndex; i <= currentRoadIndex; i++) {
             foreach (Car car in this.route.roads[i].carsOnRoute) {
                 if (!carsToCheck.Contains(car)) {
                     carsToCheck.Add(car);

diff --git a/Assets/Scenes/SampleScene.unity b/Assets/Scenes/SampleScene.unity
index b7bc75a..cedde44 100644
--- a/Assets/Scenes/SampleScene.unity
+++ b/Assets/Scenes/SampleScene.unity
@@ -239,6 +239,7 @@
   frequency: 0.2
   frequencyVariance: 0.1
   roads: {fileID: 1714391592}
+  spawnCars: 1
 --- !u!4 &128843416
 Transform:
   m_ObjectHideFlags: 0
diff --git a/Assets/Scripts/CameraControl.cs b/Assets/Scripts/CameraControl.cs
index e043c87..79c8513 100644
--- a/Assets/Scripts/CameraControl.cs
+++ b/Assets/Scripts/CameraControl.cs
@@ -45,7 +45,7 @@
         float scroll = Input.GetAxis("Mouse ScrollWheel");
         if (scroll != 0.0f) {
             scale += scroll * (-scrollSpeed);
-            scale = Mathf.Clamp(scale, -2, 2);
+            scale = Mathf.Clamp(scale, -2, 4);
             float realScale = Mathf.Pow(2, scale);
             transform.localScale = new Vector3(realScale, realScale, realScale);
         }
diff --git a/Assets/Scripts/Car/Car.cs b/Assets/Scripts/Car/Car.cs
index 6f80d5e..6540b77 100644
--- a/Assets/Scripts/Car/Car.cs
+++ b/Assets/Scripts/Car/Car.cs
@@ -107,7 +107,7 @@
         float otherTraveledDistance = car.speed * time;
         float currentCarDistance = thisDistance - otherDistance;
         float projectedDistance = otherTraveledDistance - otherDistance;
-        float savetyDistance = 3f + speed * 1.8f;
+        float savetyDistance = 3.5f + speed * 1.8f;
         if (currentCarDistance < 0 || currentCarDistance > car.brakingDistance + savetyDistance) {
             return false;
         }
@@ -124,7 +124,7 @@
     }
 
     private bool isBraking() {
-        float stoppingDistance = brakingDistance + 3f + 1.8f * speed + 1f;
+        float stoppingDistance = Mathf.Max(1.8f * speed, brakingDistance + speed) + 3.5f;
         Road currentRoad = road;
         float currentRoadPosition = roadPositon;
         int currentRoadIndex = roadIndex;
@@ -133,10 +133,10 @@
             currentRoadPosition += stoppingDistance / steps;
             float totalDistance = stoppingDistance / steps * i;
             while (currentRoadPosition >= currentRoad.path.length) {
-                currentRoadIndex++;
-                if (currentRoadIndex == route.roads.Count) {
+                if (currentRoadIndex == route.roads.Count - 1) {
                     goto end;
                 }
+                currentRoadIndex++;
                 currentRoadPosition -= currentRoad.path.length;
                 currentRoad = route.roads[currentRoadIndex];
             }
@@ -153,7 +153,7 @@
         }
     end:
         List<Car> carsToCheck = new List<Car>();
-        for (int i = this.roadIndex; i < this.route.roads.Count; i++) {
+        for (int i = this.roadIndex; i <= currentRoadIndex; i++) {
             foreach (Car car in this.route.roads[i].carsOnRoute) {
                 if (!carsToCheck.Contains(car)) {
                     carsToCheck.Add(car);
diff --git a/Assets/Scripts/Config.cs b/Assets/Scripts/Config.cs
index 1de8e19..419ffb2 100644
--- a/Assets/Scripts/Config.cs
+++ b/Assets/Scripts/Config.cs
@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using UnityEngine;
 using System.Globalization;
+using System;
 
 public class Config : MonoBehaviour {
     public Material roadMaterial, roadEditMaterial, carBrakingMaterial, carAccelerationMaterial;
@@ -21,12 +22,12 @@
     private string roadNetworkFileName, outputFileName;
     private float time;
     public Transform roads;
-
+    public bool spawnCars = true;
        
     private static string getCLIArgumentValue(string name) {
         string[] arguments = System.Environment.GetCommandLineArgs();
-        for (int i = 0; i < arguments.Length; i++) {
-            if (arguments[i] == name && arguments.Length > i + 1) {
+        for (int i = 0; i < arguments.Length - 1; i++) {
+            if (arguments[i] == name) {
                 return arguments[i + 1];
             }
         }
@@ -47,16 +48,32 @@
     private void Start() {
         roadNetworkFileName = getCLIArgumentValue("-i");
         outputFileName = getCLIArgumentValue("-o");
-        string timeString = getCLIArgumentValue("-t");
 
         if (roadNetworkFileName.Length > 0) {
             LoadButton.loadRoadNetworkFromFile(roadNetworkFileName, this);
         }
+        string timeString = getCLIArgumentValue("-t");
         if (timeString.Length > 0) {
             time = float.Parse(timeString, CultureInfo.InvariantCulture.NumberFormat);
         } else {
             time = float.PositiveInfinity;
         }
+        string frequencyString = getCLIArgumentValue("-f");
+        if (frequencyString.Length > 0) {
+            frequency = float.Parse(frequencyString, CultureInfo.InvariantCulture.NumberFormat);
+        }
+        string redTimeString = getCLIArgumentValue("-red");
+        if (redTimeString.Length > 0) {
+            trafficLights.redTime = float.Parse(redTimeString, CultureInfo.InvariantCulture.NumberFormat);
+        }
+        string greenTimeString = getCLIArgumentValue("-green");
+        if (greenTimeString.Length > 0) {
+            trafficLights.greenTime = float.Parse(greenTimeString, CultureInfo.InvariantCulture.NumberFormat);
+        }
+        string invertLightsString = getCLIArgumentValue("-invert");
+        if (invertLightsString.Length > 0) {
+            trafficLights.invert = bool.Parse(invertLightsString);
+        }
     }
 
     private void Update() {
@@ -65,7 +82,9 @@
         }
         time -= Time.deltaTime;
         if (time <= 0) {
-            SaveTravelTimes.saveTravelTimesToFile(outputFileName, this);
+            if (outputFileName.Length > 0) {
+                SaveTravelTimes.saveTravelTimesToFile(outputFileName, this);
+            }
             Application.Quit();
         }
     }

diff --git a/Assets/Scenes/SampleScene.unity b/Assets/Scenes/SampleScene.unity
index b7bc75a..cedde44 100644
--- a/Assets/Scenes/SampleScene.unity
+++ b/Assets/Scenes/SampleScene.unity
@@ -239,6 +239,7 @@
   frequency: 0.2
   frequencyVariance: 0.1
   roads: {fileID: 1714391592}
+  spawnCars: 1
 --- !u!4 &128843416
 Transform:
   m_ObjectHideFlags: 0
diff --git a/Assets/Scripts/CameraControl.cs b/Assets/Scripts/CameraControl.cs
index e043c87..79c8513 100644
--- a/Assets/Scripts/CameraControl.cs
+++ b/Assets/Scripts/CameraControl.cs
@@ -45,7 +45,7 @@
         float scroll = Input.GetAxis("Mouse ScrollWheel");
         if (scroll != 0.0f) {
             scale += scroll * (-scrollSpeed);
-            scale = Mathf.Clamp(scale, -2, 2);
+            scale = Mathf.Clamp(scale, -2, 4);
             float realScale = Mathf.Pow(2, scale);
             transform.localScale = new Vector3(realScale, realScale, realScale);
         }
diff --git a/Assets/Scripts/Car/Car.cs b/Assets/Scripts/Car/Car.cs
index 6f80d5e..6540b77 100644
--- a/Assets/Scripts/Car/Car.cs
+++ b/Assets/Scripts/Car/Car.cs
@@ -107,7 +107,7 @@
         float otherTraveledDistance = car.speed * time;
         float currentCarDistance = thisDistance - otherDistance;
         float projectedDistance = otherTraveledDistance - otherDistance;
-        float savetyDistance = 3f + speed * 1.8f;
+        float savetyDistance = 3.5f + speed * 1.8f;
         if (currentCarDistance < 0 || currentCarDistance > car.brakingDistance + savetyDistance) {
             return false;
         }
@@ -124,7 +124,7 @@
     }
 
     private bool isBraking() {
-        float stoppingDistance = brakingDistance + 3f + 1.8f * speed + 1f;
+        float stoppingDistance = Mathf.Max(1.8f * speed, brakingDistance + speed) + 3.5f;
         Road currentRoad = road;
         float currentRoadPosition = roadPositon;
         int currentRoadIndex = roadIndex;
@@ -133,10 +133,10 @@
             currentRoadPosition += stoppingDistance / steps;
             float totalDistance = stoppingDistance / steps * i;
             while (currentRoadPosition >= currentRoad.path.length) {
-                currentRoadIndex++;
-                if (currentRoadIndex == route.roads.Count) {
+                if (currentRoadIndex == route.roads.Count - 1) {
                     goto end;
                 }
+                currentRoadIndex++;
                 currentRoadPosition -= currentRoad.path.length;
                 currentRoad = route.roads[currentRoadIndex];
             }
@@ -153,7 +153,7 @@
         }
     end:
         List<Car> carsToCheck = new List<Car>();
-        for (int i = this.roadIndex; i < this.route.roads.Count; i++) {
+        for (int i = this.roadIndex; i <= currentRoadIndex; i++) {
             foreach (Car car in this.route.roads[i].carsOnRoute) {
                 if (!carsToCheck.Contains(car)) {
                     carsToCheck.Add(car);
diff --git a/Assets/Scripts/Config.cs b/Assets/Scripts/Config.cs
index 1de8e19..419ffb2 100644
--- a/Assets/Scripts/Config.cs
+++ b/Assets/Scripts/Config.cs
@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using UnityEngine;
 using System.Globalization;
+using System;
 
 public class Config : MonoBehaviour {
     public Material roadMaterial, roadEditMaterial, carBrakingMaterial, carAccelerationMaterial;
@@ -21,12 +22,12 @@
     private string roadNetworkFileName, outputFileName;
     private float time;
     public Transform roads;
-
+    public bool spawnCars = true;
        
     private static string getCLIArgumentValue(string name) {
         string[] arguments = System.Environment.GetCommandLineArgs();
-        for (int i = 0; i < arguments.Length; i++) {
-            if (arguments[i] == name && arguments.Length > i + 1) {
+        for (int i = 0; i < arguments.Length - 1; i++) {
+            if (arguments[i] == name) {
                 return arguments[i + 1];
             }
         }
@@ -47,16 +48,32 @@
     private void Start() {
         roadNetworkFileName = getCLIArgumentValue("-i");
         outputFileName = getCLIArgumentValue("-o");
-        string timeString = getCLIArgumentValue("-t");
 
         if (roadNetworkFileName.Length > 0) {
             LoadButton.loadRoadNetworkFromFile(roadNetworkFileName, this);
         }
+        string timeString = getCLIArgumentValue("-t");
         if (timeString.Length > 0) {
             time = float.Parse(timeString, CultureInfo.InvariantCulture.NumberFormat);
         } else {
             time = float.PositiveInfinity;
         }
+        string frequencyString = getCLIArgumentValue("-f");
+        if (frequencyString.Length > 0) {
+            frequency = float.Parse(frequencyString, CultureInfo.InvariantCulture.NumberFormat);
+        }
+        string redTimeString = getCLIArgumentValue("-red");
+        if (redTimeString.Length > 0) {
+            trafficLights.redTime = float.Parse(redTimeString, CultureInfo.InvariantCulture.NumberFormat);
+        }
+        string greenTimeString = getCLIArgumentValue("-green");
+        if (greenTimeString.Length > 0) {
+            trafficLights.greenTime = float.Parse(greenTimeString, CultureInfo.InvariantCulture.NumberFormat);
+        }
+        string invertLightsString = getCLIArgumentValue("-invert");
+        if (invertLightsString.Length > 0) {
+            trafficLights.invert = bool.Parse(invertLightsString);
+        }
     }
 
     private void Update() {
@@ -65,7 +82,9 @@
         }
         time -= Time.deltaTime;
         if (time <= 0) {
-            SaveTravelTimes.saveTravelTimesToFile(outputFileName, this);
+            if (outputFileName.Length > 0) {
+                SaveTravelTimes.saveTravelTimesToFile(outputFileName, this);
+            }
             Application.Quit();
         }
     }
diff --git a/Assets/Scripts/Roads/Node/SpawnNodeData.cs b/Assets/Scripts/Roads/Node/SpawnNodeData.cs
index 55e2a3e..2c81d1e 100644
--- a/Assets/Scripts/Roads/Node/SpawnNodeData.cs
+++ b/Assets/Scripts/Roads/Node/SpawnNodeData.cs
@@ -12,7 +12,7 @@
             timeLeft = Random.Range(1 / (config.frequency * (1 - config.frequencyVariance)), 1 / (config.frequency * (1 + config.frequencyVariance)));
             ExitNodeData target = targets[Random.Range(0, targets.Count)];
             Route route = new Route(node, target.node);
-            bool canSummon = route.isValid;
+            bool canSummon = route.isValid && config.spawnCars;
             foreach (Car car in route.roads[0].carsOnRoute) {
                 if (car.roadPositon <= 3f) {
                     canSummon = false;

diff --git a/Assets/Scenes/SampleScene.unity b/Assets/Scenes/SampleScene.unity
index b7bc75a..cedde44 100644
--- a/Assets/Scenes/SampleScene.unity
+++ b/Assets/Scenes/SampleScene.unity
@@ -239,6 +239,7 @@
   frequency: 0.2
   frequencyVariance: 0.1
   roads: {fileID: 1714391592}
+  spawnCars: 1
 --- !u!4 &128843416
 Transform:
   m_ObjectHideFlags: 0
diff --git a/Assets/Scripts/CameraControl.cs b/Assets/Scripts/CameraControl.cs
index e043c87..79c8513 100644
--- a/Assets/Scripts/CameraControl.cs
+++ b/Assets/Scripts/CameraControl.cs
@@ -45,7 +45,7 @@
         float scroll = Input.GetAxis("Mouse ScrollWheel");
         if (scroll != 0.0f) {
             scale += scroll * (-scrollSpeed);
-            scale = Mathf.Clamp(scale, -2, 2);
+            scale = Mathf.Clamp(scale, -2, 4);
             float realScale = Mathf.Pow(2, scale);
             transform.localScale = new Vector3(realScale, realScale, realScale);
         }
diff --git a/Assets/Scripts/Car/Car.cs b/Assets/Scripts/Car/Car.cs
index 6f80d5e..6540b77 100644
--- a/Assets/Scripts/Car/Car.cs
+++ b/Assets/Scripts/Car/Car.cs
@@ -107,7 +107,7 @@
         float otherTraveledDistance = car.speed * time;
         float currentCarDistance = thisDistance - otherDistance;
         float projectedDistance = otherTraveledDistance - otherDistance;
-        float savetyDistance = 3f + speed * 1.8f;
+        float savetyDistance = 3.5f + speed * 1.8f;
         if (currentCarDistance < 0 || currentCarDistance > car.brakingDistance + savetyDistance) {
             return false;
         }
@@ -124,7 +124,7 @@
     }
 
     private bool isBraking() {
-        float stoppingDistance = brakingDistance + 3f + 1.8f * speed + 1f;
+        float stoppingDistance = Mathf.Max(1.8f * speed, brakingDistance + speed) + 3.5f;
         Road currentRoad = road;
         float currentRoadPosition = roadPositon;
         int currentRoadIndex = roadIndex;
@@ -133,10 +133,10 @@
             currentRoadPosition += stoppingDistance / steps;
             float totalDistance = stoppingDistance / steps * i;
             while (currentRoadPosition >= currentRoad.path.length) {
-                currentRoadIndex++;
-                if (currentRoadIndex == route.roads.Count) {
+                if (currentRoadIndex == route.roads.Count - 1) {
                     goto end;
                 }
+                currentRoadIndex++;
                 currentRoadPosition -= currentRoad.path.length;
                 currentRoad = route.roads[currentRoadIndex];
             }
@@ -153,7 +153,7 @@
         }
     end:
         List<Car> carsToCheck = new List<Car>();
-        for (int i = this.roadIndex; i < this.route.roads.Count; i++) {
+        for (int i = this.roadIndex; i <= currentRoadIndex; i++) {
             foreach (Car car in this.route.roads[i].carsOnRoute) {
                 if (!carsToCheck.Contains(car)) {
                     carsToCheck.Add(car);
diff --git a/Assets/Scripts/Config.cs b/Assets/Scripts/Config.cs
index 1de8e19..419ffb2 100644
--- a/Assets/Scripts/Config.cs
+++ b/Assets/Scripts/Config.cs
@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using UnityEngine;
 using System.Globalization;
+using System;
 
 public class Config : MonoBehaviour {
     public Material roadMaterial, roadEditMaterial, carBrakingMaterial, carAccelerationMaterial;
@@ -21,12 +22,12 @@
     private string roadNetworkFileName, outputFileName;
     private float time;
     public Transform roads;
-
+    public bool spawnCars = true;
        
     private static string getCLIArgumentValue(string name) {
         string[] arguments = System.Environment.GetCommandLineArgs();
-        for (int i = 0; i < arguments.Length; i++) {
-            if (arguments[i] == name && arguments.Length > i + 1) {
+        for (int i = 0; i < arguments.Length - 1; i++) {
+            if (arguments[i] == name) {
                 return arguments[i + 1];
             }
         }
@@ -47,16 +48,32 @@
     private void Start() {
         roadNetworkFileName = getCLIArgumentValue("-i");
         outputFileName = getCLIArgumentValue("-o");
-        string timeString = getCLIArgumentValue("-t");
 
         if (roadNetworkFileName.Length > 0) {
             LoadButton.loadRoadNetworkFromFile(roadNetworkFileName, this);
         }
+        string timeString = getCLIArgumentValue("-t");
         if (timeString.Length > 0) {
             time = float.Parse(timeString, CultureInfo.InvariantCulture.NumberFormat);
         } else {
             time = float.PositiveInfinity;
         }
+        string frequencyString = getCLIArgumentValue("-f");
+        if (frequencyString.Length > 0) {
+            frequency = float.Parse(frequencyString, CultureInfo.InvariantCulture.NumberFormat);
+        }
+        string redTimeString = getCLIArgumentValue("-red");
+        if (redTimeString.Length > 0) {
+            trafficLights.redTime = float.Parse(redTimeString, CultureInfo.InvariantCulture.NumberFormat);
+        }
+        string greenTimeString = getCLIArgumentValue("-green");
+        if (greenTimeString.Length > 0) {
+            trafficLights.greenTime = float.Parse(greenTimeString, CultureInfo.InvariantCulture.NumberFormat);
+        }
+        string invertLightsString = getCLIArgumentValue("-invert");
+        if (invertLightsString.Length > 0) {
+            trafficLights.invert = bool.Parse(invertLightsString);
+        }
     }
 
     private void Update() {
@@ -65,7 +82,9 @@
         }
         time -= Time.deltaTime;
         if (time <= 0) {
-            SaveTravelTimes.saveTravelTimesToFile(outputFileName, this);
+            if (outputFileName.Length > 0) {
+                SaveTravelTimes.saveTravelTimesToFile(outputFileName, this);
+            }
             Application.Quit();
         }
     }
diff --git a/Assets/Scripts/Roads/Node/SpawnNodeData.cs b/Assets/Scripts/Roads/Node/SpawnNodeData.cs
index 55e2a3e..2c81d1e 100644
--- a/Assets/Scripts/Roads/Node/SpawnNodeData.cs
+++ b/Assets/Scripts/Roads/Node/SpawnNodeData.cs
@@ -12,7 +12,7 @@
             timeLeft = Random.Range(1 / (config.frequency * (1 - config.frequencyVariance)), 1 / (config.frequency * (1 + config.frequencyVariance)));
             ExitNodeData target = targets[Random.Range(0, targets.Count)];
             Route route = new Route(node, target.node);
-            bool canSummon = route.isValid;
+            bool canSummon = route.isValid && config.spawnCars;
             foreach (Car car in route.roads[0].carsOnRoute) {
                 if (car.roadPositon <= 3f) {
                     canSummon = false;
diff --git a/Assets/Scripts/TrafficLights.cs b/Assets/Scripts/TrafficLights.cs
index 63d841c..a0e405a 100644
--- a/Assets/Scripts/TrafficLights.cs
+++ b/Assets/Scripts/TrafficLights.cs
@@ -14,19 +14,20 @@
     public float greenTime = 10f;
     public float redTime = 2f;
     public int lightPhase = 1;
+    public bool invert = false;
 
     private void handleTurnGreen(List<CustomNode> nodes) {
         foreach (CustomNode node in nodes) {
             if (node.lightPhase != lightPhase) {
                 continue;
             }
-            node.isPassable = true;
+            node.isPassable = !invert;
         }
     }
 
     private void handleTurnRed(List<CustomNode> nodes) {
         foreach (CustomNode node in nodes) {
-            node.isPassable = false;
+            node.isPassable = invert;
         }
     }
 

diff --git a/Assets/Scenes/SampleScene.unity b/Assets/Scenes/SampleScene.unity
index b7bc75a..cedde44 100644
--- a/Assets/Scenes/SampleScene.unity
+++ b/Assets/Scenes/SampleScene.unity
@@ -239,6 +239,7 @@
   frequency: 0.2
   frequencyVariance: 0.1
   roads: {fileID: 1714391592}
+  spawnCars: 1
 --- !u!4 &128843416
 Transform:
   m_ObjectHideFlags: 0
diff --git a/Assets/Scripts/CameraControl.cs b/Assets/Scripts/CameraControl.cs
index e043c87..79c8513 100644
--- a/Assets/Scripts/CameraControl.cs
+++ b/Assets/Scripts/CameraControl.cs
@@ -45,7 +45,7 @@
         float scroll = Input.GetAxis("Mouse ScrollWheel");
         if (scroll != 0.0f) {
             scale += scroll * (-scrollSpeed);
-            scale = Mathf.Clamp(scale, -2, 2);
+            scale = Mathf.Clamp(scale, -2, 4);
             float realScale = Mathf.Pow(2, scale);
             transform.localScale = new Vector3(realScale, realScale, realScale);
         }
diff --git a/Assets/Scripts/Car/Car.cs b/Assets/Scripts/Car/Car.cs
index 6f80d5e..6540b77 100644
--- a/Assets/Scripts/Car/Car.cs
+++ b/Assets/Scripts/Car/Car.cs
@@ -107,7 +107,7 @@
         float otherTraveledDistance = car.speed * time;
         float currentCarDistance = thisDistance - otherDistance;
         float projectedDistance = otherTraveledDistance - otherDistance;
-        float savetyDistance = 3f + speed * 1.8f;
+        float savetyDistance = 3.5f + speed * 1.8f;
         if (currentCarDistance < 0 || currentCarDistance > car.brakingDistance + savetyDistance) {
             return false;
         }
@@ -124,7 +124,7 @@
     }
 
     private bool isBraking() {
-        float stoppingDistance = brakingDistance + 3f + 1.8f * speed + 1f;
+        float stoppingDistance = Mathf.Max(1.8f * speed, brakingDistance + speed) + 3.5f;
         Road currentRoad = road;
         float currentRoadPosition = roadPositon;
         int currentRoadIndex = roadIndex;
@@ -133,10 +133,10 @@
             currentRoadPosition += stoppingDistance / steps;
             float totalDistance = stoppingDistance / steps * i;
             while (currentRoadPosition >= currentRoad.path.length) {
-                currentRoadIndex++;
-                if (currentRoadIndex == route.roads.Count) {
+                if (currentRoadIndex == route.roads.Count - 1) {
                     goto end;
                 }
+                currentRoadIndex++;
                 currentRoadPosition -= currentRoad.path.length;
                 currentRoad = route.roads[currentRoadIndex];
             }
@@ -153,7 +153,7 @@
         }
     end:
         List<Car> carsToCheck = new List<Car>();
-        for (int i = this.roadIndex; i < this.route.roads.Count; i++) {
+        for (int i = this.roadIndex; i <= currentRoadIndex; i++) {
             foreach (Car car in this.route.roads[i].carsOnRoute) {
                 if (!carsToCheck.Contains(car)) {
                     carsToCheck.Add(car);
diff --git a/Assets/Scripts/Config.cs b/Assets/Scripts/Config.cs
index 1de8e19..419ffb2 100644
--- a/Assets/Scripts/Config.cs
+++ b/Assets/Scripts/Config.cs
@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using UnityEngine;
 using System.Globalization;
+using System;
 
 public class Config : MonoBehaviour {
     public Material roadMaterial, roadEditMaterial, carBrakingMaterial, carAccelerationMaterial;
@@ -21,12 +22,12 @@
     private string roadNetworkFileName, outputFileName;
     private float time;
     public Transform roads;
-
+    public bool spawnCars = true;
        
     private static string getCLIArgumentValue(string name) {
         string[] arguments = System.Environment.GetCommandLineArgs();
-        for (int i = 0; i < arguments.Length; i++) {
-            if (arguments[i] == name && arguments.Length > i + 1) {
+        for (int i = 0; i < arguments.Length - 1; i++) {
+            if (arguments[i] == name) {
                 return arguments[i + 1];
             }
         }
@@ -47,16 +48,32 @@
     private void Start() {
         roadNetworkFileName = getCLIArgumentValue("-i");
         outputFileName = getCLIArgumentValue("-o");
-        string timeString = getCLIArgumentValue("-t");
 
         if (roadNetworkFileName.Length > 0) {
             LoadButton.loadRoadNetworkFromFile(roadNetworkFileName, this);
         }
+        string timeString = getCLIArgumentValue("-t");
         if (timeString.Length > 0) {
             time = float.Parse(timeString, CultureInfo.InvariantCulture.NumberFormat);
         } else {
             time = float.PositiveInfinity;
         }
+        string frequencyString = getCLIArgumentValue("-f");
+        if (frequencyString.Length > 0) {
+            frequency = float.Parse(frequencyString, CultureInfo.InvariantCulture.NumberFormat);
+        }
+        string redTimeString = getCLIArgumentValue("-red");
+        if (redTimeString.Length > 0) {
+            trafficLights.redTime = float.Parse(redTimeString, CultureInfo.InvariantCulture.NumberFormat);
+        }
+        string greenTimeString = getCLIArgumentValue("-green");
+        if (greenTimeString.Length > 0) {
+            trafficLights.greenTime = float.Parse(greenTimeString, CultureInfo.InvariantCulture.NumberFormat);
+        }
+        string invertLightsString = getCLIArgumentValue("-invert");
+        if (invertLightsString.Length > 0) {
+            trafficLights.invert = bool.Parse(invertLightsString);
+        }
     }
 
     private void Update() {
@@ -65,7 +82,9 @@
         }
         time -= Time.deltaTime;
         if (time <= 0) {
-            SaveTravelTimes.saveTravelTimesToFile(outputFileName, this);
+            if (outputFileName.Length > 0) {
+                SaveTravelTimes.saveTravelTimesToFile(outputFileName, this);
+            }
             Application.Quit();
         }
     }
diff --git a/Assets/Scripts/Roads/Node/SpawnNodeData.cs b/Assets/Scripts/Roads/Node/SpawnNodeData.cs
index 55e2a3e..2c81d1e 100644
--- a/Assets/Scripts/Roads/Node/SpawnNodeData.cs
+++ b/Assets/Scripts/Roads/Node/SpawnNodeData.cs
@@ -12,7 +12,7 @@
             timeLeft = Random.Range(1 / (config.frequency * (1 - config.frequencyVariance)), 1 / (config.frequency * (1 + config.frequencyVariance)));
             ExitNodeData target = targets[Random.Range(0, targets.Count)];
             Route route = new Route(node, target.node);
-            bool canSummon = route.isValid;
+            bool canSummon = route.isValid && config.spawnCars;
             foreach (Car car in route.roads[0].carsOnRoute) {
                 if (car.roadPositon <= 3f) {
                     canSummon = false;
diff --git a/Assets/Scripts/TrafficLights.cs b/Assets/Scripts/TrafficLights.cs
index 63d841c..a0e405a 100644
--- a/Assets/Scripts/TrafficLights.cs
+++ b/Assets/Scripts/TrafficLights.cs
@@ -14,19 +14,20 @@
     public float greenTime = 10f;
     public float redTime = 2f;
     public int lightPhase = 1;
+    public bool invert = false;
 
     private void handleTurnGreen(List<CustomNode> nodes) {
         foreach (CustomNode node in nodes) {
             if (node.lightPhase != lightPhase) {
                 continue;
             }
-            node.isPassable = true;
+            node.isPassable = !invert;
         }
     }
 
     private void handleTurnRed(List<CustomNode> nodes) {
         foreach (CustomNode node in nodes) {
-            node.isPassable = false;
+            node.isPassable = invert;
         }
     }
 
diff --git a/ProjectSettings/ProjectSettings.asset b/ProjectSettings/ProjectSettings.asset
index 83acfd7..a40d2cb 100644
--- a/ProjectSettings/ProjectSettings.asset
+++ b/ProjectSettings/ProjectSettings.asset
@@ -88,7 +88,7 @@
   bakeCollisionMeshes: 0
   forceSingleInstance: 0
   useFlipModelSwapchain: 1
-  resizableWindow: 0
+  resizableWindow: 1
   useMacAppStoreValidation: 0
   macAppStoreCategory: public.app-category.games
   gpuSkinning: 1
@@ -152,7 +152,8 @@
   resolutionScalingMode: 0
   androidSupportedAspectRatio: 1
   androidMaxAspectRatio: 2.1
-  applicationIdentifier: {}
+  applicationIdentifier:
+    Standalone: com.DefaultCompany.Traffic
   buildNumber:
     Standalone: 0
     iPhone: 0