diff --git a/brouter-core/src/main/java/btools/router/RoutingContext.java b/brouter-core/src/main/java/btools/router/RoutingContext.java
index 1e0b27d..be0fe55 100644
--- a/brouter-core/src/main/java/btools/router/RoutingContext.java
+++ b/brouter-core/src/main/java/btools/router/RoutingContext.java
@@ -347,22 +347,30 @@ public final class RoutingContext
           }
           if ( nogo.isNogo )
           {
-            if (Double.isNaN(nogo.nogoWeight))
-            {
-                // Nogo is default nogo (ignore completely)
+            if (!(nogo instanceof OsmNogoPolygon)) {  // nogo is a circle
+              if (Double.isNaN(nogo.nogoWeight)) {
+                // default nogo behaviour (ignore completely)
                 nogoCost = -1;
-            }
-            else if (!(nogo instanceof OsmNogoPolygon)) {
-              // nogo is a circle, compute distance within the circle
-              nogoCost = nogo.distanceWithinRadius(lon1, lat1, lon2, lat2, d) * nogo.nogoWeight;
+              } else {
+                // nogo weight, compute distance within the circle
+                nogoCost = nogo.distanceWithinRadius(lon1, lat1, lon2, lat2, d) * nogo.nogoWeight;
+              }
             }
             else if (((OsmNogoPolygon)nogo).intersects(lon1, lat1, lon2, lat2))
             {
-              // nogo is a polygon, compute distance within the polygon
-              if (((OsmNogoPolygon)nogo).isClosed) {
-                nogoCost = ((OsmNogoPolygon)nogo).distanceWithinPolygon(lon1, lat1, lon2, lat2) * nogo.nogoWeight;
+              // nogo is a polyline/polygon, we have to check there is indeed
+              // an intersection in this case (radius check is not enough).
+              if (Double.isNaN(nogo.nogoWeight)) {
+                // default nogo behaviour (ignore completely)
+                nogoCost = -1;
               } else {
-                nogoCost = nogo.nogoWeight;
+                if (((OsmNogoPolygon)nogo).isClosed) {
+                  // compute distance within the polygon
+                  nogoCost = ((OsmNogoPolygon)nogo).distanceWithinPolygon(lon1, lat1, lon2, lat2) * nogo.nogoWeight;
+                } else {
+                  // for a polyline, just add a constant penalty
+                  nogoCost = nogo.nogoWeight;
+                }
               }
             }
           }