osg::ref_ptr<osg::Vec3Array> taxi_vertices = new osg::Vec3Array;
osg::ref_ptr<osg::Vec3Array> pvt_vertices = new osg::Vec3Array;
osg::ref_ptr<osg::Vec3Array> taxi_vertices = new osg::Vec3Array;
osg::ref_ptr<osg::Vec3Array> pvt_vertices = new osg::Vec3Array;