diff --git a/be-graphes-gui/src/main/java/org/insa/graphs/gui/simple/Launch.java b/be-graphes-gui/src/main/java/org/insa/graphs/gui/simple/Launch.java
index aa7ea04..0a8e01e 100644
--- a/be-graphes-gui/src/main/java/org/insa/graphs/gui/simple/Launch.java
+++ b/be-graphes-gui/src/main/java/org/insa/graphs/gui/simple/Launch.java
@@ -14,6 +14,7 @@ import org.insa.graphs.gui.drawing.components.BasicDrawing;
 import org.insa.graphs.model.Graph;
 import org.insa.graphs.model.Path;
 import org.insa.graphs.model.io.BinaryGraphReader;
+import org.insa.graphs.model.io.BinaryPathReader;
 import org.insa.graphs.model.io.GraphReader;
 import org.insa.graphs.model.io.PathReader;
 
@@ -57,23 +58,26 @@ public class Launch {
         try (final GraphReader reader = new BinaryGraphReader(new DataInputStream(
                 new BufferedInputStream(new FileInputStream(mapName))))) {
 
-            // TODO: read the graph
-            graph = null;
+            // DONE: read the graph
+            graph = reader.read();
         }
 
         // create the drawing
         final Drawing drawing = createDrawing();
 
-        // TODO: draw the graph on the drawing
+        // DONE: draw the graph on the drawing
+        drawing.drawGraph(graph);
 
-        // TODO: create a path reader
-        try (final PathReader pathReader = null) {
+        // DONE: create a path reader
+        try (final PathReader pathReader = new BinaryPathReader(new DataInputStream(
+                new BufferedInputStream(new FileInputStream(pathName))))) {
 
-            // TODO: read the path
-            path = null;
+            // DONE: read the path
+            path = pathReader.readPath(graph);
         }
 
-        // TODO: draw the path on the drawing
+        // DONE: draw the path on the drawing
+        drawing.drawPath(path);
     }
 
 }
diff --git a/be-graphes-model/src/main/java/org/insa/graphs/model/Path.java b/be-graphes-model/src/main/java/org/insa/graphs/model/Path.java
index d6a570e..3758400 100644
--- a/be-graphes-model/src/main/java/org/insa/graphs/model/Path.java
+++ b/be-graphes-model/src/main/java/org/insa/graphs/model/Path.java
@@ -4,6 +4,7 @@ import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Comparator;
 import java.util.List;
+import java.util.Iterator;
 
 /**
  * <p>
@@ -26,12 +27,32 @@ public class Path {
      * @return A path that goes through the given list of nodes.
      * @throws IllegalArgumentException If the list of nodes is not valid, i.e. two
      *         consecutive nodes in the list are not connected in the graph.
-     * @deprecated Need to be implemented.
      */
     public static Path createFastestPathFromNodes(Graph graph, List<Node> nodes)
             throws IllegalArgumentException {
         List<Arc> arcs = new ArrayList<Arc>();
-        // TODO:
+
+        if (nodes.size() == 1) { return new Path(graph, nodes.get(0)); }
+
+        for (int i = 0; i < nodes.size() - 1; i++) {
+            Arc bestArc = null;
+            double bestSpeed = Double.MAX_VALUE;
+            for (Arc arcsucc : nodes.get(i).getSuccessors()) {
+                if (arcsucc.getDestination().equals(nodes.get(i+1))) {
+                    int succspeed = arcsucc.getRoadInformation().getMaximumSpeed();
+                    if (arcsucc.getTravelTime(succspeed) < bestSpeed) {
+                        bestArc = arcsucc;
+                        bestSpeed = arcsucc.getTravelTime(succspeed);
+                    }
+                }
+            }
+            if (bestArc == null) {
+                throw new IllegalArgumentException();
+            } else {
+                arcs.add(bestArc);
+            }
+        }
+
         return new Path(graph, arcs);
     }
 
@@ -193,11 +214,21 @@ public class Path {
      * </ul>
      *
      * @return true if the path is valid, false otherwise.
-     * @deprecated Need to be implemented.
      */
     public boolean isValid() {
-        // TODO:
-        return false;
+        
+        if (this.isEmpty()) { return true; }
+        if (this.size() == 1 && this.arcs.isEmpty()) { return true; }
+        if (!this.arcs.get(0).getOrigin().equals(this.origin)) { return false; }
+
+        Boolean good = true;  
+        for (int i = 0; i < this.arcs.size() - 1; i++) {
+            if (!this.arcs.get(i).getDestination().equals(this.arcs.get(i+1).getOrigin())) {
+                good = false;
+            }
+        }
+
+        return good;
     }
 
     /**