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 6ebdb73..daf5366 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
@@ -201,8 +201,30 @@ public class Path {
      * @deprecated Need to be implemented.
      */
     public boolean isValid() {
-        // TODO:
-        return false;
+
+
+        if (this.isEmpty() == true) {
+            return true ;
+        }
+        if (this.size() == 1) {
+                return true ;
+        }
+
+        int i = 0 ;
+
+        if (!this.getArcs().get(i).getOrigin().equals(this.origin)) {
+            return false ;
+        }
+
+        for (i=1;i<this.getArcs().size();i++) {
+
+                    if (!this.getArcs().get(i-1).getDestination().equals(this.getArcs().get(i).getOrigin())) {
+
+                        return false ;
+                    }
+                }
+        
+            return true ;
     }
 
     /**
@@ -210,11 +232,14 @@ public class Path {
      * 
      * @return Total length of the path (in meters).
      * 
-     * @deprecated Need to be implemented.
+     * 
      */
     public float getLength() {
-        // TODO:
-        return 0;
+        float result = 0.0f ;
+        for (Arc a : this.getArcs()) {
+            result += a.getLength() ;
+        }
+        return result;
     }
 
     /**
@@ -225,11 +250,10 @@ public class Path {
      * @return Time (in seconds) required to travel this path at the given speed (in
      *         kilometers-per-hour).
      * 
-     * @deprecated Need to be implemented.
+     * 
      */
     public double getTravelTime(double speed) {
-        // TODO:
-        return 0;
+        return (this.getLength()/speed)*3.6f;
     }
 
     /**
@@ -238,11 +262,14 @@ public class Path {
      * 
      * @return Minimum travel time to travel this path (in seconds).
      * 
-     * @deprecated Need to be implemented.
+     * 
      */
     public double getMinimumTravelTime() {
-        // TODO:
-        return 0;
+        double result = 0.0 ; 
+        for (Arc a : this.getArcs()) {
+            result += a.getMinimumTravelTime() ;
+        }
+        return result ;
     }
 
 }