if (hops == null) {
hops = new ArrayList<StopHopData>();
hopsByStop.put(fromStopId, hops);
}
hops.add(new StopHopData(toStopId, minTravelTime));
if( fromStopId.toString().equals("1_75403") || fromStopId.toString().equals("1_75414") || fromStopId.toString().equals("1_18120") )
System.out.println(fromStopId + " " + toStopId + " " + minTravelTime );
}