/**
* Print the visited stop count as a show of progress
*/
if (vertex instanceof HasStopTransitVertex) {
HasStopTransitVertex v = (HasStopTransitVertex) vertex;
StopEntry stop = v.getStop();
if (_stops.add(stop) && _stops.size() % 100 == 0) {
System.out.println("stops=" + _stops.size());
if (_stops.size() == 13900)
System.out.println("here");
}