/**
* This vertex combination occurs when we are doing an "arrive by"
* trip and we need to do a transfer between two stops.
*/
ArrivalVertex fromStopVertex = (ArrivalVertex) vFrom;
StopEntry fromStop = fromStopVertex.getStop();
BlockDepartureVertex toStopVertex = (BlockDepartureVertex) vTo;
ArrivalAndDepartureInstance departureInstance = toStopVertex.getInstance();
StopEntry toStop = departureInstance.getStop();