Congestion at the roundabout immediately outside the Airport can be significant as can the tailback on the R132/Swords Road. Prioritisation may be difficult to achieve without significant roadworks at this roundabout. A better option may be to turn onto the Swords Road buslane followed by a left into the Airport however clarity will be required on the ability of vehicles to get from the bus lane into the right hand turn.
Leaving the Airport a “Bus” filter light may give vehicles a means to bypass any congestion. At the Motorway roundabout consideration may be given to extinguishing the “u-turn” available from M1S to M1N at this junction which may also facilitate the removal of the traffic signals from the roundabout completely.