The southern portal features a striking gateway built of red and cream stone.
The southern portal to the tunnel under the airport is located just to the north of this station.
The southern portal bears a brick date stone of 1884.
Yeerongpilly was chosen as the southern portal because it had less impact on residents than a tunnel entrance at Fairfield.
The toll plaza is located beside the tunnel control building at the southern portal, near Dublin Port.
It is also convenient to the southern portal of the Western Harbour Crossing.
To the north and south, it is supported by buttresses that rise above the northern and southern main portals.
Upon the tympanum above the lintel of the southern portal are the carvings of crosses.
The Dublin Port Tunnel southern portal is also located nearby.
Lancet arches with stalactitical infillings are centers of the southern, western and eastern portals.
