Can I park at Derry’s North West Transport Hub and board a train?

Yes.

The North West Transport Hub at Derry railway station is listed as a rail Park and Ride location. It is on the Waterside side of the River Foyle, rather than at the city-centre bus station. That distinction is important if you are coming by car to catch the train towards Coleraine or Belfast. Search specifically for “North West Transport Hub” in your directions, not just “Derry station”, and confirm access arrangements and train times.