diff --git a/src/main/java/playground/amit/Delhi/overlap/algo/elements/SegmentalOverlap.java b/src/main/java/playground/amit/Delhi/overlap/algo/elements/SegmentalOverlap.java
index 31c8f1c0..e8b24a4f 100644
--- a/src/main/java/playground/amit/Delhi/overlap/algo/elements/SegmentalOverlap.java
+++ b/src/main/java/playground/amit/Delhi/overlap/algo/elements/SegmentalOverlap.java
@@ -56,7 +56,7 @@ void remove(String vehicleNumber, String tripId){
     }
 
     public int getCount() {
-        return counter;
+        return Math.min(counter - OverlapOptimizer.MIN_DEVICES, 1);
     }
 
     public Tuple<String, String> getSelfTripVehicleRoute() {
diff --git a/src/main/java/playground/amit/Delhi/overlap/algo/optimizer/OverlapOptimizer.java b/src/main/java/playground/amit/Delhi/overlap/algo/optimizer/OverlapOptimizer.java
index 6d60ff7d..d04f91c7 100644
--- a/src/main/java/playground/amit/Delhi/overlap/algo/optimizer/OverlapOptimizer.java
+++ b/src/main/java/playground/amit/Delhi/overlap/algo/optimizer/OverlapOptimizer.java
@@ -22,6 +22,7 @@
 public class OverlapOptimizer {
 
     public static final Logger LOG = LogManager.getLogger(OverlapOptimizer.class);
+    public static int MIN_DEVICES;
 
 //    public enum OptimizingElements{vehicle, GTFS}
 
@@ -34,8 +35,9 @@ public class OverlapOptimizer {
     private final SigmoidFunction sigmoidFunction;
     private double totalNetworkRouteLength= Double.NaN;
 
-    public OverlapOptimizer(int timebinSize, String outputPath, SigmoidFunction sigmoidFunction){
+    public OverlapOptimizer(int timebinSize, String outputPath, SigmoidFunction sigmoidFunction, int minDevicesPerTimeBin){
       this.spatialOverlap = new SpatialOverlap(timebinSize);
+      MIN_DEVICES = minDevicesPerTimeBin;
       this.outputPath = outputPath;
       this.sigmoidFunction = sigmoidFunction;
       String date = new SimpleDateFormat("dd-MM-yy").format(Calendar.getInstance().getTime());
diff --git a/src/main/java/playground/amit/Delhi/overlap/gtfs/DelhiGTFSOverlapIdentifier.java b/src/main/java/playground/amit/Delhi/overlap/gtfs/DelhiGTFSOverlapIdentifier.java
index ea27f370..d7340b34 100644
--- a/src/main/java/playground/amit/Delhi/overlap/gtfs/DelhiGTFSOverlapIdentifier.java
+++ b/src/main/java/playground/amit/Delhi/overlap/gtfs/DelhiGTFSOverlapIdentifier.java
@@ -11,9 +11,13 @@ public class DelhiGTFSOverlapIdentifier {
 	public static void main(String[] args) {
 		String GTFS_PATH = "..\\..\\repos\\sl-repos\\shared\\data\\project_data\\delhi\\gtfs_files\\\\12052021\\GTFS_DIMTS_12052021.zip";
 		int timebinSize = 24*60*60;
+		int freqDataPointsDevice = 1;
+		int minDataPointsPerTimeBin = 40; // configurable
+		int minDevicesPerTimeBin = (int) Math.ceil( (freqDataPointsDevice* timebinSize/60) / minDataPointsPerTimeBin );
+
 		String outFilePath = "..\\..\\repos\\sl-repos\\shared\\data\\project_data\\delhi\\gtfs_files\\25052021\\gtfs_overlap_prob_24hTimebin_excludingSelfTrips\\";
 
-		OverlapOptimizer optimizer = new OverlapOptimizer(timebinSize, outFilePath, SigmoidFunction.BipolarSigmoid);
+		OverlapOptimizer optimizer = new OverlapOptimizer(timebinSize, outFilePath, SigmoidFunction.BipolarSigmoid, minDevicesPerTimeBin);
 		optimizer.initializeWithGTFS(GTFS_PATH);
 //		optimizer.run(10);
 		optimizer.optimizeTillProb(0.0);
diff --git a/src/main/java/playground/amit/Delhi/overlap/vehicles/DelhiVehicleOverlapIdentifier.java b/src/main/java/playground/amit/Delhi/overlap/vehicles/DelhiVehicleOverlapIdentifier.java
index 2f2e6e7a..fbd62ff4 100644
--- a/src/main/java/playground/amit/Delhi/overlap/vehicles/DelhiVehicleOverlapIdentifier.java
+++ b/src/main/java/playground/amit/Delhi/overlap/vehicles/DelhiVehicleOverlapIdentifier.java
@@ -9,13 +9,22 @@
  */
 
 public class DelhiVehicleOverlapIdentifier {
+
+
+
     public static void main(String[] args) {
         String GTFS_PATH = FileUtils.SVN_PROJECT_DATA_DRIVE+"\\delhi\\gtfs_files\\\\12052021\\GTFS_DIMTS_12052021.zip";
         String vehicles_file = FileUtils.SVN_PROJECT_DATA_DRIVE+"\\delhi\\dimts\\Mar2021\\VehicleSampleData.txt";
+
         int timebinSize = 24*60*60;
+        int freqDataPointsDevice = 1;
+        int minDataPointsPerTimeBin = 40; // configurable
+        int minDevicesPerTimeBin = (int) Math.ceil( (freqDataPointsDevice* timebinSize) / minDataPointsPerTimeBin );
+
+
         String outFilePath = FileUtils.SVN_PROJECT_DATA_DRIVE+"\\delhi\\gtfs_files\\02122021\\vehicles_overlap_prob_24hTimebin_excludingSelfTrips\\";
 
-        OverlapOptimizer optimizer = new OverlapOptimizer(timebinSize, outFilePath, SigmoidFunction.BipolarSigmoid);
+        OverlapOptimizer optimizer = new OverlapOptimizer(timebinSize, outFilePath, SigmoidFunction.BipolarSigmoid, minDevicesPerTimeBin);
         optimizer.initializeWithGTFSAndVehicles(GTFS_PATH, vehicles_file);
 //		optimizer.run(10);
         optimizer.optimizeTillProb(0.0);