It's about 12km from Clongriffin to the airport which would connect the Belfast line straight in to the terminal. Surely in 2017 a way could be found to link the airport by rail like any other modern European city. Too many vested interests in Dublin have obstructed the rail link over the years which has relegated Dublin to a lower level. It's possible now in many cities to check in at a rail station and collect your bag at the destination. Join Clongriffin to the airport and forget all the studies that are never ending.