Very little is going to move pax away from cars.
- Busses are not numerous enough, as there is no enjoyment in dragging cases (and possibly children) 10 mins to the bus stop - then it might require a change of bus. Allowing for changes and delays, the time factor can be enormous.
- Trains are only helpful if you live near the station on the line that goes to the airport. If you do not, and have a lift/taxi to the correct station - you might as well go direct to the airport. Allowing for changes and delays, the time factor can be enormous.
If the DART had had a big drop off / collection area and a low fare ride - it 'might' have been a solution. But, no capital project gets the go ahead on just making life easier for the customers. It must (at least on paper) make a profit.
Therefore, personal car/taxi drop off and collection will continue.