diff --git a/src/main/java/fr/u_paris/gla/project/itinerary/Graph.java b/src/main/java/fr/u_paris/gla/project/itinerary/Graph.java
index 4d31dd9..3009bbc 100644
--- a/src/main/java/fr/u_paris/gla/project/itinerary/Graph.java
+++ b/src/main/java/fr/u_paris/gla/project/itinerary/Graph.java
@@ -1,5 +1,6 @@
 package fr.u_paris.gla.project.itinerary;
 
+import java.util.HashMap;
 import java.util.Map;
 import java.util.Set;
 
diff --git a/src/main/java/fr/u_paris/gla/project/itinerary/GraphNode.java b/src/main/java/fr/u_paris/gla/project/itinerary/GraphNode.java
index 9067cb4..d14f37b 100644
--- a/src/main/java/fr/u_paris/gla/project/itinerary/GraphNode.java
+++ b/src/main/java/fr/u_paris/gla/project/itinerary/GraphNode.java
@@ -3,7 +3,7 @@ package fr.u_paris.gla.project.itinerary;
 import java.util.List;
 import java.util.Set;
 
-public interface GraphNode{
+public interface GraphNode {
     int getId();
     double getHeuristicCost(Stop goalNode);
 
diff --git a/src/main/java/fr/u_paris/gla/project/itinerary/Main.java b/src/main/java/fr/u_paris/gla/project/itinerary/Main.java
index f141637..eb0266d 100644
--- a/src/main/java/fr/u_paris/gla/project/itinerary/Main.java
+++ b/src/main/java/fr/u_paris/gla/project/itinerary/Main.java
@@ -48,88 +48,50 @@ public class Main{
         return new double[] {Double.parseDouble(stringCoords[0]), Double.parseDouble(stringCoords[1])};
     }
 
-    private static List<Stop> getStops(HashSet<Stop> nodes, String name, String gps) {
-        double []coords = getCoords(gps);
-        return nodes.stream().filter(
-                stop -> stop.getName().equals(name)
-                        && stop.getLatitude() == coords[0]
-                        && stop.getLongitude() == coords[1]
-        ).toList();
-    }
-
-    /*
-    private static Stop getOrCreateStop(HashSet<Stop> nodes, String name, String gps, String lineId) {
-        List<Stop> stops = getStops(nodes, name, gps);
-        if (stops.isEmpty()) {
+    private static Stop getOrCreateStop(HashSet<Stop> nodes, HashMap<String, Stop> tmp, String name, String gps, String lineId) {
+        Stop stop = tmp.get(gps);
+        if (stop == null) {
             double[] coords = getCoords(gps);
             Stop newStop = new Stop(lineId, name, coords[0], coords[1]);
             nodes.add(newStop);
+            tmp.put(gps, newStop);
             return newStop;
         }
-        else if (stops.size() == 1) {
-            stops.get(0).addLine(lineId);
-            return stops.get(0);
-        }
         else {
-            LOGGER.severe("Error in graph creation");
-            return null;
+            stop.addLine(lineId);
+            return stop;
         }
     }
 
     public static int lineNB = 0;
 
-    private static void addLine(String[] line, HashSet<Stop> nodes, HashMap<Integer, Set<Connection>> connections) {
-        // TODO Cas particulier ou une ligne a le même nom
-
-        Stop fromStop = getOrCreateStop(nodes, line[IDFM_TRACE_FROM_INDEX], line[IDFM_TRACE_FROM_GPS_INDEX], line[IDFM_TRACE_ID_INDEX]);
-        Stop toStop = getOrCreateStop(nodes, line[IDFM_TRACE_TO_INDEX], line[IDFM_TRACE_TO_GPS_INDEX], line[IDFM_TRACE_ID_INDEX]);
-
-        if (fromStop == null || toStop == null)
-            return;
+    private static void addLine(String[] line, HashSet<Stop> nodes, HashMap<String, Stop> tmp, HashMap<Stop, Set<Connection>> connections) {
+        Stop fromStop = getOrCreateStop(nodes, tmp, line[IDFM_TRACE_FROM_INDEX], line[IDFM_TRACE_FROM_GPS_INDEX], line[IDFM_TRACE_ID_INDEX]);
+        Stop toStop = getOrCreateStop(nodes, tmp, line[IDFM_TRACE_TO_INDEX], line[IDFM_TRACE_TO_GPS_INDEX], line[IDFM_TRACE_ID_INDEX]);
 
         String[] timeString = line[IDFM_TRACE_TIME_INDEX].split(":");
         int time = Integer.parseInt(timeString[0]) * 60 + Integer.parseInt(timeString[1]);
 
-        Connection connection = new Connection(toStop.getId(), line[IDFM_TRACE_ID_INDEX], Double.parseDouble(line[IDFM_TRACE_DISTANCE_INDEX]), time);
-
-        connections.computeIfAbsent(fromStop.getId(), k -> new HashSet<>()).add(connection);
-
-/*
-        Set<Connection> linesConnections = connections.get(fromStop.getId());
-
-        String[] timeString = line[IDFM_TRACE_TIME_INDEX].split(":");
-        int time = Integer.parseInt(timeString[0]) * 60 + Integer.parseInt(timeString[1]);
-        Connection connection = new Connection(toStop.getId(), line[IDFM_TRACE_ID_INDEX], Double.parseDouble(line[IDFM_TRACE_DISTANCE_INDEX]), time);
-        if (linesConnections == null)
-            connections.put(fromStop.getId(), new HashSet<>(List.of(connection)));
-        else
-            linesConnections.add(connection);
-
-        if (lineNB++ % 1000 == 0) {
-            LOGGER.log(Level.INFO,"Added line " + line[IDFM_TRACE_ID_INDEX] + " from " + line[IDFM_TRACE_FROM_INDEX] + " to " + line[IDFM_TRACE_TO_INDEX] + ", line " + lineNB);
-        }
+        Connection connection = new Connection(toStop, line[IDFM_TRACE_ID_INDEX], Double.parseDouble(line[IDFM_TRACE_DISTANCE_INDEX]), time);
 
+        connections.computeIfAbsent(fromStop, k -> new HashSet<>()).add(connection);
     }
- */
 
     public static void main(String[] args){
-        // TODO ajouter option du nom en argument
         if (args.length != 0) {
             LOGGER.severe("Invalid command line. Target file names are in the main file for now.");
             return;
         }
 
-        /*
         try {
             HashSet<Stop> nodes = new HashSet<>();
-            HashMap<Integer, Set<Connection>> connections = new HashMap<>();
+            HashMap<Stop, Set<Connection>> connections = new HashMap<>();
+            HashMap<String, Stop> tmp = new HashMap<>();
             CSVTools.readCSVFromFile(TRACE_FILE_NAME,
-                    (String[] line) -> addLine(line, nodes, connections));
+                    (String[] line) -> addLine(line, nodes, tmp, connections));
             Graph<Stop> graph = new Graph<>(nodes, connections);
         } catch (IOException e) {
             LOGGER.log(Level.SEVERE, "Error while reading the line paths", e);
         }
-
-         */
     }
 }
diff --git a/src/main/java/fr/u_paris/gla/project/itinerary/Stop.java b/src/main/java/fr/u_paris/gla/project/itinerary/Stop.java
index da0d4ca..bc0ac4d 100644
--- a/src/main/java/fr/u_paris/gla/project/itinerary/Stop.java
+++ b/src/main/java/fr/u_paris/gla/project/itinerary/Stop.java
@@ -9,8 +9,11 @@ public class Stop implements GraphNode {
     private final int id;
 
     private final Set<String> lines;
+
     private final String name;
+
     private final double latitude;
+
     private final double longitude;
 
     public Stop(String line, String name, double latitude, double longitude) {