Ainda não temos significados para "be a westbound".
1There would be a westbound bus leaving in an hour and ten minutes.
2Reaching the station I found that the first train through would be a westbound, and that it was not due for half an hour.
3I remembered that there was a westbound train passing through at midnight, and by hurrying I hoped to be able to catch it.
4He called the railroad station, found there was a westbound train in a little over two hours, and tried to reserve a bedroom.