Index: src/assets/lSplineAsset.cpp
===================================================================
--- src/assets/lSplineAsset.cpp (revision 6302)
+++ src/assets/lSplineAsset.cpp (working copy)
@@ -317,7 +317,7 @@
        trafficLane.offset = pt.z();
        trafficLane.velocity = velocity;
        // trafficLine.isDirect = dir*osg::Vec3d(1.0, 0.0, 0.0) > 0;
-       trafficLane.isDirect = trafficLane.offset >= 0;
+       trafficLane.isDirect = spline.verts.front().x() - spline.verts.back().x() >= 0 ? true : false;

        this->trafficLanes.push_back(trafficLane);
    });