3 files changed, 20 insertions, 11 deletions
diff --git a/src/main/java/org/traccar/reports/ReportUtils.java b/src/main/java/org/traccar/reports/ReportUtils.java
index 870264fad..8dd77606c 100644
--- a/src/main/java/org/traccar/reports/ReportUtils.java
+++ b/src/main/java/org/traccar/reports/ReportUtils.java
@@ -29,6 +29,7 @@ import org.traccar.Context;
 import org.traccar.database.DeviceManager;
 import org.traccar.database.IdentityManager;
 import org.traccar.handler.events.MotionEventHandler;
+import org.traccar.helper.UnitsConverter;
 import org.traccar.model.DeviceState;
 import org.traccar.model.Driver;
 import org.traccar.model.Event;
@@ -173,11 +174,9 @@ public final class ReportUtils {
         Position startTrip = positions.get(startIndex);
         Position endTrip = positions.get(endIndex);
 
-        double speedMax = 0.0;
-        double speedSum = 0.0;
+        double speedMax = 0;
         for (int i = startIndex; i <= endIndex; i++) {
             double speed = positions.get(i).getSpeed();
-            speedSum += speed;
             if (speed > speedMax) {
                 speedMax = speed;
             }
@@ -214,7 +213,9 @@ public final class ReportUtils {
 
         trip.setDistance(calculateDistance(startTrip, endTrip, !ignoreOdometer));
         trip.setDuration(tripDuration);
-        trip.setAverageSpeed(speedSum / (endIndex - startIndex));
+        if (tripDuration > 0) {
+            trip.setAverageSpeed(UnitsConverter.knotsFromMps(trip.getDistance() * 1000 / tripDuration));
+        }
         trip.setMaxSpeed(speedMax);
         trip.setSpentFuel(calculateFuel(startTrip, endTrip));
 
diff --git a/src/main/java/org/traccar/reports/Summary.java b/src/main/java/org/traccar/reports/Summary.java
index 83fe9caf7..d576ac1e6 100644
--- a/src/main/java/org/traccar/reports/Summary.java
+++ b/src/main/java/org/traccar/reports/Summary.java
@@ -28,6 +28,7 @@ import java.util.Date;
 
 import org.jxls.util.JxlsHelper;
 import org.traccar.Context;
+import org.traccar.helper.UnitsConverter;
 import org.traccar.model.Position;
 import org.traccar.reports.model.SummaryReport;
 
@@ -43,13 +44,11 @@ public final class Summary {
         if (positions != null && !positions.isEmpty()) {
             Position firstPosition = null;
             Position previousPosition = null;
-            double speedSum = 0;
             for (Position position : positions) {
                 if (firstPosition == null) {
                     firstPosition = position;
                 }
                 previousPosition = position;
-                speedSum += position.getSpeed();
                 if (position.getSpeed() > result.getMaxSpeed()) {
                     result.setMaxSpeed(position.getSpeed());
                 }
@@ -57,13 +56,22 @@ public final class Summary {
             boolean ignoreOdometer = Context.getDeviceManager()
                     .lookupAttributeBoolean(deviceId, "report.ignoreOdometer", false, false, true);
             result.setDistance(ReportUtils.calculateDistance(firstPosition, previousPosition, !ignoreOdometer));
-            result.setAverageSpeed(speedSum / positions.size());
             result.setSpentFuel(ReportUtils.calculateFuel(firstPosition, previousPosition));
 
+            long durationMilliseconds;
             if (firstPosition.getAttributes().containsKey(Position.KEY_HOURS)
                     && previousPosition.getAttributes().containsKey(Position.KEY_HOURS)) {
-                result.setEngineHours(
-                        previousPosition.getLong(Position.KEY_HOURS) - firstPosition.getLong(Position.KEY_HOURS));
+                durationMilliseconds =
+                        previousPosition.getLong(Position.KEY_HOURS) - firstPosition.getLong(Position.KEY_HOURS);
+                result.setEngineHours(durationMilliseconds);
+            } else {
+                durationMilliseconds =
+                        previousPosition.getFixTime().getTime() - firstPosition.getFixTime().getTime();
+            }
+
+            if (durationMilliseconds > 0) {
+                result.setAverageSpeed(
+                        UnitsConverter.knotsFromMps(result.getDistance() * 1000 / durationMilliseconds));
             }
 
             if (!ignoreOdometer
@@ -77,7 +85,7 @@ public final class Summary {
             }
 
             result.setStartTime(firstPosition.getFixTime());
-            result.setEndTime(previousPosition.getServerTime());
+            result.setEndTime(previousPosition.getFixTime());
         }
         return result;
     }
diff --git a/src/main/java/org/traccar/reports/model/BaseReport.java b/src/main/java/org/traccar/reports/model/BaseReport.java
index d0719576e..928c0557d 100644
--- a/src/main/java/org/traccar/reports/model/BaseReport.java
+++ b/src/main/java/org/traccar/reports/model/BaseReport.java
@@ -60,7 +60,7 @@ public class BaseReport {
         return averageSpeed;
     }
 
-    public void setAverageSpeed(Double averageSpeed) {
+    public void setAverageSpeed(double averageSpeed) {
         this.averageSpeed = averageSpeed;
     }