diff --git a/src/main/java/fr/u_paris/gla/project/idfm/CSVSchedulesProvider.java b/src/main/java/fr/u_paris/gla/project/idfm/CSVSchedulesProvider.java
new file mode 100644
index 0000000..afbd983
--- /dev/null
+++ b/src/main/java/fr/u_paris/gla/project/idfm/CSVSchedulesProvider.java
@@ -0,0 +1,122 @@
+package fr.u_paris.gla.project.idfm;
+
+import fr.u_paris.gla.project.io.ScheduleFormat;
+
+import java.text.NumberFormat;
+import java.util.*;
+public class CSVSchedulesProvider {
+    private static final HashMap<String, int[]> timings = new HashMap<String, int[]>(){{
+        put("Bus", new int[]{11, 8, 7});
+        put("Funicular", new int[]{15, 25, 20});
+        put("Tram", new int[]{6, 7, 8, 9});
+        put("Rail", new int[]{10, 11,15,12});
+        put("Subway", new int[]{4, 2, 6,3,3,4});
+    }};
+    private static final NumberFormat MINUTES_SECOND_FORMATTER = NumberFormat
+            .getInstance(Locale.ENGLISH);
+
+    static {
+        MINUTES_SECOND_FORMATTER.setMinimumIntegerDigits(2);
+    }
+
+    private final String[] line = new String[ScheduleFormat.NUMBER_COLUMNS];
+    private final Iterator<Transport> currentTransport;
+    private Iterator<TraceDescription> currentDescription = Collections.emptyIterator();
+
+    // private Stop start = null;
+    // private Stop end   = null;
+    // private boolean hasNext = false;
+    // private boolean onNext = false;
+    private int hours_count = 0;
+    private String last_hour = ""; 
+
+    /**
+     * Create the stream provider
+     */
+    public CSVSchedulesProvider(Iterator<Transport> transports) {
+        this.currentTransport = transports;
+    }
+
+    public boolean hasNext() {
+        return currentTransport.hasNext() || currentDescription.hasNext();
+    }
+
+    private void skipToNext() {
+        if (hours_count == 2){
+            skipToNextDescription();
+            hours_count = 0;
+        }else if(hours_count == 1){
+            this.line[ScheduleFormat.TIME_INDEX] = last_hour;
+        }else if (!this.currentDescription.hasNext()) {
+            skipToNextTransport();
+        }
+        
+    }
+
+    private void skipToNextDescription() {
+        if (this.currentDescription.hasNext()) {
+            TraceDescription description = this.currentDescription.next();
+            hours_count = 0;
+            // this.start = new Stop(description.from);
+            // this.end = new Stop(description.to);
+            this.line[ScheduleFormat.TERMINUS_INDEX] = description.from;
+            this.line[ScheduleFormat.TRIP_SEQUENCE_INDEX] = description.bifurcation.toString();
+            this.line[ScheduleFormat.TIME_INDEX] = description.first;
+            last_hour = description.last;
+            // this.onNext = true;
+            // this.hasNext = true;
+        }else{
+            skipToNextTransport();
+        }
+    }
+
+    private void skipToNextTransport() {
+        if (this.currentTransport.hasNext()) {
+            Transport transport = this.currentTransport.next();
+            this.line[ScheduleFormat.LINE_INDEX] = transport.name;
+            // transport.buildBifurcation();
+            this.currentDescription = transport.descriptions.iterator();
+            skipToNextDescription();
+        } else {
+            // this.onNext = true;
+            // this.hasNext = false;
+        }
+    }
+
+    public String[][] next() {
+        if (!hasNext()) {
+            return null;
+        }
+        skipToNext();
+        hours_count ++;
+        return new String[][]{Arrays.copyOf(this.line, this.line.length)};
+
+        // if (!this.currentTransport.hasNext()) {
+        //     return new String[][]{Arrays.copyOf(this.line, this.line.length)};
+        // }
+        // Transport transport = this.currentTransport.next();
+
+        // // Store all lines for this iteration
+        // List<String[]> allLines = new ArrayList<>();
+
+        // transport.descriptions.forEach(desc -> {
+        //     Arrays.stream(findTimes(desc.first, desc.last)).forEach(time -> {
+        //         String[] newLine = Arrays.copyOf(this.line, this.line.length);
+        //         newLine[ScheduleFormat.LINE_INDEX] = transport.name;
+        //         newLine[ScheduleFormat.TRIP_SEQUENCE_INDEX] = desc.bifurcation.toString();
+        //         newLine[ScheduleFormat.TERMINUS_INDEX] = desc.to;
+        //         newLine[ScheduleFormat.TIME_INDEX] = time;
+        //         allLines.add(Arrays.copyOf(newLine, newLine.length));
+        //     });
+        // });
+
+        // return allLines.toArray(new String[0][]);
+    }
+
+    private String[] findTimes(String start, String last) {
+        return new String[]{
+            start,
+            last,
+        };
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/fr/u_paris/gla/project/idfm/IDFMNetworkExtractor.java b/src/main/java/fr/u_paris/gla/project/idfm/IDFMNetworkExtractor.java
index df3e2c0..53622c4 100644
--- a/src/main/java/fr/u_paris/gla/project/idfm/IDFMNetworkExtractor.java
+++ b/src/main/java/fr/u_paris/gla/project/idfm/IDFMNetworkExtractor.java
@@ -119,6 +119,8 @@ public class IDFMNetworkExtractor {
         // Transport ligne_1 = transports.get("IDFM:C01371");
         Transport ligne_7 = transports.get("IDFM:C01377");
         Transport rerd = transports.get("IDFM:C01728");
+        Transport b54b = transports.get("IDFM:C00940");
+
 
         System.out.println("****** AFFICHAGE LIGNE ******");
 
@@ -148,9 +150,23 @@ public class IDFMNetworkExtractor {
         rerd.buildBifurcation();
         System.out.println("******************Derniere description ***********************");
         System.out.println(ligne_7.descriptions);
+        System.out.println("******************Description 54B ************************");
+        b54b.buildBifurcation();
+        System.out.println(b54b.descriptions);
+        System.out.println("******************Building bifurcations ************************");
+        for (Transport entry : transports.values()) {
+            entry.buildBifurcation();
+        }
+        System.out.println("******************Fin Building bifurcations ************************");
+        // System.out.println("Transport size :"+transports.size());
+        // System.out.println("Trace size :"+traces.size());
+
+
+        
 
         // Write into args[1]
-        CSVStreamSchedulesProvider providerschedules = new CSVStreamSchedulesProvider(traces.values().iterator(), transports);
+        // CSVStreamSchedulesProvider providerschedules = new CSVStreamSchedulesProvider(traces.values().iterator(), transports);
+        CSVSchedulesProvider providerschedules = new CSVSchedulesProvider(transports.values().iterator());
         try {
             CSVTools.writeCSVToFile(args[1], Stream.iterate(providerschedules.next(),
                     t -> providerschedules.hasNext(), t -> providerschedules.next()));
diff --git a/src/main/java/fr/u_paris/gla/project/idfm/Transport.java b/src/main/java/fr/u_paris/gla/project/idfm/Transport.java
index a66658f..e16e7e1 100644
--- a/src/main/java/fr/u_paris/gla/project/idfm/Transport.java
+++ b/src/main/java/fr/u_paris/gla/project/idfm/Transport.java
@@ -35,7 +35,7 @@ public class Transport {
                 }
             }
         }
-        System.out.println("J'en ai trouvé "+found);
+        // System.out.println("J'en ai trouvé "+found);
     }
 
     public boolean isTerminus(String stop){