for (LinkTag linkTag : parser.linkTags.values())
        {
            if (linkTag.straightTag != null && linkTag.nodeStartTag.coordinate != null && linkTag.nodeEndTag.coordinate != null)
            {
                if (linkTag.nodeStartTag.angle == null)
                {
                    double dx = linkTag.nodeEndTag.coordinate.x - linkTag.nodeStartTag.coordinate.x;
                    double dy = linkTag.nodeEndTag.coordinate.y - linkTag.nodeStartTag.coordinate.y;
                    linkTag.nodeStartTag.angle = new Direction(Math.atan2(dy, dx), DirectionUnit.EAST_RADIAN);
                }
                if (linkTag.nodeEndTag.angle == null)
                {
                    double dx = linkTag.nodeEndTag.coordinate.x - linkTag.nodeStartTag.coordinate.x;
                    double dy = linkTag.nodeEndTag.coordinate.y - linkTag.nodeStartTag.coordinate.y;
                    linkTag.nodeEndTag.angle = new Direction(Math.atan2(dy, dx), DirectionUnit.EAST_RADIAN);
                }
            }
        }

        // are there polyline tags with nodes without an angle?
        for (LinkTag linkTag : parser.linkTags.values())

        else if (ocStr.startsWith("LEFTSET"))
        {
            int lset1 = ocStr.indexOf('[') + 1;
            int rset1 = ocStr.indexOf(']', lset1);
            int lset2 = ocStr.indexOf('[', ocStr.indexOf("OVERTAKE")) + 1;
            int rset2 = ocStr.indexOf(']', lset2);
            if (lset1 == -1 || rset1 == -1 || rset1 - lset1 < 3 || lset2 == -1 || rset2 == -1 || rset2 - lset2 < 3)
            {
                throw new NetworkException("Sets in overtaking conditions string: '" + ocStr + "' not coded right");
            }
            Set<GTUType> overtakingGTUs = parseGTUTypeSet(ocStr.substring(lset1, rset1), parser);
            Set<GTUType> overtakenGTUs = parseGTUTypeSet(ocStr.substring(lset2, rset2), parser);
            if (ocStr.contains("RIGHTSPEED"))