diff --git a/brouter-map-creator/src/main/java/btools/mapcreator/WayLinker.java b/brouter-map-creator/src/main/java/btools/mapcreator/WayLinker.java
index 195a16e..37220e3 100644
--- a/brouter-map-creator/src/main/java/btools/mapcreator/WayLinker.java
+++ b/brouter-map-creator/src/main/java/btools/mapcreator/WayLinker.java
@@ -38,7 +38,6 @@ public class WayLinker extends MapCreatorBase implements Runnable {
   private File trafficTilesIn;
   private File dataTilesOut;
   private File borderFileIn;
-  private File restrictionsFileIn;
 
   private String dataTilesSuffix;
 
@@ -157,7 +156,6 @@ public class WayLinker extends MapCreatorBase implements Runnable {
     this.trafficTilesIn = new File("../traffic");
     this.dataTilesOut = dataTilesOut;
     this.borderFileIn = borderFileIn;
-    this.restrictionsFileIn = restrictionsFileIn;
     this.dataTilesSuffix = dataTilesSuffix;
 
     BExpressionMetaData meta = new BExpressionMetaData();
diff --git a/brouter-mapaccess/src/main/java/btools/mapaccess/DirectWeaver.java b/brouter-mapaccess/src/main/java/btools/mapaccess/DirectWeaver.java
index b3d25c8..29b113d 100644
--- a/brouter-mapaccess/src/main/java/btools/mapaccess/DirectWeaver.java
+++ b/brouter-mapaccess/src/main/java/btools/mapaccess/DirectWeaver.java
@@ -16,8 +16,6 @@ import btools.util.ByteDataWriter;
 public final class DirectWeaver extends ByteDataWriter {
   private long id64Base;
 
-  private int size = 0;
-
   public DirectWeaver(StatCoderContext bc, DataBuffers dataBuffers, int lonIdx, int latIdx, int divisor, TagValueValidator wayValidator, WaypointMatcher waypointMatcher, OsmNodesMap hollowNodes) {
     super(null);
     int cellsize = 1000000 / divisor;
@@ -31,7 +29,7 @@ public final class DirectWeaver extends ByteDataWriter {
     NoisyDiffCoder extLatDiff = new NoisyDiffCoder(bc);
     NoisyDiffCoder transEleDiff = new NoisyDiffCoder(bc);
 
-    size = bc.decodeNoisyNumber(5);
+    int size = bc.decodeNoisyNumber(5);
 
     int[] faid = size > dataBuffers.ibuf2.length ? new int[size] : dataBuffers.ibuf2;
 
diff --git a/brouter-mapaccess/src/main/java/btools/mapaccess/NodesCache.java b/brouter-mapaccess/src/main/java/btools/mapaccess/NodesCache.java
index 7cd4785..cef46b0 100644
--- a/brouter-mapaccess/src/main/java/btools/mapaccess/NodesCache.java
+++ b/brouter-mapaccess/src/main/java/btools/mapaccess/NodesCache.java
@@ -39,7 +39,7 @@ public final class NodesCache {
 
   private long cacheSum = 0;
   private long maxmemtiles;
-  private boolean detailed;
+  private boolean detailed; // NOPMD used in constructor
 
   private boolean garbageCollectionEnabled = false;
   private boolean ghostCleaningDone = false;
diff --git a/brouter-mapaccess/src/main/java/btools/mapaccess/PhysicalFile.java b/brouter-mapaccess/src/main/java/btools/mapaccess/PhysicalFile.java
index 75ac995..921bd31 100644
--- a/brouter-mapaccess/src/main/java/btools/mapaccess/PhysicalFile.java
+++ b/brouter-mapaccess/src/main/java/btools/mapaccess/PhysicalFile.java
@@ -19,7 +19,6 @@ final public class PhysicalFile {
   long[] fileIndex = new long[25];
   int[] fileHeaderCrcs;
 
-  private int fileIndexCrc;
   public long creationTime;
 
   String fileName;
@@ -75,7 +74,7 @@ final public class PhysicalFile {
     byte[] iobuffer = dataBuffers.iobuffer;
     ra = new RandomAccessFile(f, "r");
     ra.readFully(iobuffer, 0, 200);
-    fileIndexCrc = Crc32.crc(iobuffer, 0, 200);
+    int fileIndexCrc = Crc32.crc(iobuffer, 0, 200);
     ByteDataReader dis = new ByteDataReader(iobuffer);
     for (int i = 0; i < 25; i++) {
       long lv = dis.readLong();
diff --git a/config/pmd/pmd-ruleset.xml b/config/pmd/pmd-ruleset.xml
index a09ea44..0cf6e66 100644
--- a/config/pmd/pmd-ruleset.xml
+++ b/config/pmd/pmd-ruleset.xml
@@ -34,7 +34,6 @@
         <exclude name="SimplifiableTestAssertion" />
         <exclude name="SimplifiedTernary" />
         <exclude name="SimplifyBooleanReturns" />
-        <exclude name="SingularField" />
         <exclude name="UncommentedEmptyConstructor" />
         <exclude name="UncommentedEmptyMethodBody" />
         <exclude name="UnnecessaryFullyQualifiedName" />