Index: src/org/openstreetmap/josm/plugins/validator/tests/DuplicateWay.java
===================================================================
--- src/org/openstreetmap/josm/plugins/validator/tests/DuplicateWay.java	(revision 0)
+++ src/org/openstreetmap/josm/plugins/validator/tests/DuplicateWay.java	(revision 0)
@@ -0,0 +1,151 @@
+package org.openstreetmap.josm.plugins.validator.tests;
+
+import static org.openstreetmap.josm.tools.I18n.tr;
+
+import java.util.Collection;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Vector;
+import java.util.Map;
+
+import org.openstreetmap.josm.Main;
+import org.openstreetmap.josm.command.Command;
+import org.openstreetmap.josm.command.DeleteCommand;
+import org.openstreetmap.josm.command.SequenceCommand;
+import org.openstreetmap.josm.data.coor.LatLon;
+import org.openstreetmap.josm.data.osm.Node;
+import org.openstreetmap.josm.data.osm.Way;
+import org.openstreetmap.josm.data.osm.OsmPrimitive;
+import org.openstreetmap.josm.plugins.validator.Severity;
+import org.openstreetmap.josm.plugins.validator.Test;
+import org.openstreetmap.josm.plugins.validator.TestError;
+import org.openstreetmap.josm.plugins.validator.util.Bag;
+/**
+ * Tests if there are duplicate ways
+ */
+public class DuplicateWay extends Test
+{
+
+    private class WayPair {
+	public List<LatLon> coor;
+	public Map<String, String> keys;
+	public WayPair(List<LatLon> _coor,Map<String, String> _keys) {
+	    coor=_coor;
+	    keys=_keys;
+	}
+	@Override
+	public int hashCode() {
+	    return coor.hashCode()+keys.hashCode();
+	}
+	@Override
+	public boolean equals(Object obj) {
+            if (!(obj instanceof WayPair)) return false;
+            WayPair wp = (WayPair) obj;
+	    return wp.coor.equals(coor) && wp.keys.equals(keys);
+	}
+    }
+
+    protected static int DUPLICATE_WAY = 1;
+
+    /** Bag of all ways */
+    Bag<WayPair, OsmPrimitive> ways;
+
+    /**
+     * Constructor
+     */
+    public DuplicateWay()
+    {
+        super(tr("Duplicated ways")+".",
+              tr("This test checks that there are no ways with same tags and same node coordinates."));
+    }
+
+
+    @Override
+    public void startTest()
+    {
+        ways = new Bag<WayPair, OsmPrimitive>(1000);
+    }
+
+    @Override
+    public void endTest()
+    {
+        for(List<OsmPrimitive> duplicated : ways.values() )
+        {
+            if( duplicated.size() > 1)
+            {
+                TestError testError = new TestError(this, Severity.ERROR, tr("Duplicated ways"), DUPLICATE_WAY, duplicated);
+                errors.add( testError );
+            }
+        }
+        ways = null;
+    }
+
+    @Override
+    public void visit(Way w)
+    {
+        if( w.deleted || w.incomplete )
+            return;
+	List<Node> wNodes=w.getNodes();
+	Vector<LatLon> wLat=new Vector<LatLon>(wNodes.size());
+	for(int i=0;i<wNodes.size();i++) {
+ 		wLat.add(wNodes.get(i).getCoor());
+	}
+	Map<String, String> wkeys=w.getKeys();
+	wkeys.remove("created_by");
+	WayPair wKey=new WayPair(wLat,wkeys);
+        ways.add(wKey, w);
+    }
+
+    /**
+     * Fix the error by removing all but one instance of duplicate ways
+     */
+    @Override
+    public Command fixError(TestError testError)
+    {
+        Collection<? extends OsmPrimitive> sel = testError.getPrimitives();
+        LinkedList<Way> ways = new LinkedList<Way>();
+
+        for (OsmPrimitive osm : sel)
+            if (osm instanceof Way)
+                ways.add((Way)osm);
+
+        if( ways.size() < 2 )
+            return null;
+
+        long idToKeep = 0;
+        // Only one way will be kept - the one with lowest positive ID, if such exist
+	// or one "at random" if no such exists. Rest of the ways will be deleted
+        for (Way w: ways) {
+            if (w.id > 0) {
+		if (idToKeep == 0 || w.id < idToKeep) idToKeep = w.id;
+            }
+        }
+
+	if (idToKeep > 0) {
+	    //Remove chosen way from the list, rest of ways in the list will be deleted
+            for (Way w: ways) {
+                if (w.id == idToKeep) {
+	    	    ways.remove(w);
+		    break;
+                }
+            }
+	} else {
+	    //Remove first way from the list, delete the rest
+	    ways.remove(0);
+	}
+
+	//Delete all ways in the list
+	//Note: nodes are not deleted, these can be detected and deleted at next pass
+        Collection<Command> commands = new LinkedList<Command>();
+	commands.add(new DeleteCommand(ways));
+        Main.main.undoRedo.add(new SequenceCommand(tr("Delete duplicate ways"), commands));
+        return null;
+    }
+
+    @Override
+    public boolean isFixable(TestError testError)
+    {
+        return (testError.getTester() instanceof DuplicateWay);
+    }
+
+}
Index: src/org/openstreetmap/josm/plugins/validator/OSMValidatorPlugin.java
===================================================================
--- src/org/openstreetmap/josm/plugins/validator/OSMValidatorPlugin.java	(revision 17415)
+++ src/org/openstreetmap/josm/plugins/validator/OSMValidatorPlugin.java	(working copy)
@@ -38,6 +38,7 @@
 import org.openstreetmap.josm.plugins.validator.tests.Coastlines;
 import org.openstreetmap.josm.plugins.validator.tests.CrossingWays;
 import org.openstreetmap.josm.plugins.validator.tests.DuplicateNode;
+import org.openstreetmap.josm.plugins.validator.tests.DuplicateWay;
 import org.openstreetmap.josm.plugins.validator.tests.DuplicatedWayNodes;
 import org.openstreetmap.josm.plugins.validator.tests.NodesWithSameName;
 import org.openstreetmap.josm.plugins.validator.tests.OverlappingWays;
@@ -96,6 +97,7 @@
             UnclosedWays.class, // ID 1101 .. 1199
             TagChecker.class, // ID 1201 .. 1299
             UnconnectedWays.class, // ID 1301 .. 1399
+	    DuplicateWay.class,
     };
 
     /**