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 188bfa5..cc5a5c9 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
@@ -187,7 +187,9 @@ public class Path {
      * @deprecated Need to be implemented.
      */
     public boolean isValid() {
-        // TODO:
+        if (this.isEmpty() || !(this.origin.hasSuccessors()) || (this.origin()==this.arcs[0].getOrigin() && (for(i=0;i<this.arcs.getLength(),i++)) )){
+
+        };
         return false;
     }
 
@@ -210,7 +212,6 @@ public class Path {
      * @param speed Speed to compute the travel time.
      * @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) {
         double longueur = (double) this.getLength() / 1000;
@@ -223,11 +224,13 @@ public class Path {
      * every arc.
      *
      * @return Minimum travel time to travel this path (in seconds).
-     * @deprecated Need to be implemented.
      */
     public double getMinimumTravelTime() {
-        // TODO:
-        return 0;
+        double mintime = 0;
+        for (Arc a : this.arcs) {
+            mintime = mintime + a.getMinimumTravelTime();
+        }
+        return mintime;
     }
 
 }