diff --git a/brouter-core/src/main/java/btools/router/RoutingContext.java b/brouter-core/src/main/java/btools/router/RoutingContext.java
index a4cc657..1000e1c 100644
--- a/brouter-core/src/main/java/btools/router/RoutingContext.java
+++ b/brouter-core/src/main/java/btools/router/RoutingContext.java
@@ -45,6 +45,7 @@ public final class RoutingContext implements DistanceChecker
   public int uphillcostdiv;
   public int uphillcutoff;
   public boolean carMode;
+  public boolean forceSecondaryData;
   public double pass1coefficient;
   public double pass2coefficient;
   public int elevationpenaltybuffer;
@@ -60,6 +61,7 @@ public final class RoutingContext implements DistanceChecker
     if ( downhillcostdiv != 0 ) downhillcostdiv = 1000000/downhillcostdiv;
     if ( uphillcostdiv != 0 ) uphillcostdiv = 1000000/uphillcostdiv;
     carMode = 0.f != expctxGlobal.getVariableValue( "validForCars", 0.f );
+    forceSecondaryData = 0.f != expctxGlobal.getVariableValue( "forceSecondaryData", 0.f );
     pass1coefficient = expctxGlobal.getVariableValue( "pass1coefficient", 1.5f );
     pass2coefficient = expctxGlobal.getVariableValue( "pass2coefficient", 0.f );
     elevationpenaltybuffer = (int)(expctxGlobal.getVariableValue( "elevationpenaltybuffer", 5.f )*1000000);
diff --git a/brouter-core/src/main/java/btools/router/RoutingEngine.java b/brouter-core/src/main/java/btools/router/RoutingEngine.java
index 3bbe50a..a9cee59 100644
--- a/brouter-core/src/main/java/btools/router/RoutingEngine.java
+++ b/brouter-core/src/main/java/btools/router/RoutingEngine.java
@@ -470,7 +470,7 @@ public class RoutingEngine extends Thread
   {
     nodesMap = new OsmNodesMap();
     BExpressionContext ctx = routingContext.expctxWay;
-    nodesCache = new NodesCache(segmentDir, nodesMap, ctx.meta.lookupVersion, ctx.meta.lookupMinorVersion, ctx.meta.readVarLength, routingContext.carMode, nodesCache );
+    nodesCache = new NodesCache(segmentDir, nodesMap, ctx.meta.lookupVersion, ctx.meta.lookupMinorVersion, ctx.meta.readVarLength, routingContext.carMode, routingContext.forceSecondaryData, nodesCache );
   }
 
   private OsmNode getStartNode( long startId )
diff --git a/brouter-mapaccess/src/main/java/btools/mapaccess/NodesCache.java b/brouter-mapaccess/src/main/java/btools/mapaccess/NodesCache.java
index 2b8d40f..4393a67 100644
--- a/brouter-mapaccess/src/main/java/btools/mapaccess/NodesCache.java
+++ b/brouter-mapaccess/src/main/java/btools/mapaccess/NodesCache.java
@@ -21,6 +21,7 @@ public final class NodesCache
   private int lookupMinorVersion;
   private boolean readVarLength;
   private boolean carMode;
+  private boolean forceSecondaryData;
   private String currentFileName;
 
   private HashMap<String,PhysicalFile> fileCache;
@@ -37,7 +38,7 @@ public final class NodesCache
   private boolean garbageCollectionEnabled = false;
   
 
-  public NodesCache( String segmentDir, OsmNodesMap nodesMap, int lookupVersion, int minorVersion, boolean varLen, boolean carMode, NodesCache oldCache )
+  public NodesCache( String segmentDir, OsmNodesMap nodesMap, int lookupVersion, int minorVersion, boolean varLen, boolean carMode, boolean forceSecondaryData, NodesCache oldCache )
   {
     this.segmentDir = new File( segmentDir );
     this.nodesMap = nodesMap;
@@ -45,6 +46,7 @@ public final class NodesCache
     this.lookupMinorVersion = minorVersion;
     this.readVarLength = varLen;
     this.carMode = carMode;
+    this.forceSecondaryData = forceSecondaryData;
 
     if ( !this.segmentDir.isDirectory() ) throw new RuntimeException( "segment directory " + segmentDir + " does not exist" );
 
@@ -77,6 +79,11 @@ public final class NodesCache
   
   private File getFileFromSegmentDir( String filename )
   {
+    if ( forceSecondaryData )
+    {
+      return new File( secondarySegmentsDir, filename );
+    }
+  	
     File f = new File( segmentDir, filename );
     if ( secondarySegmentsDir != null && !f.exists() )
     {