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Coolock Interchange

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Coolock Interchange
Acomhal na Cúlóige
Location Map ( geo)
M50 J2 conflicting messages.jpg
Signs describing the junction as both the M50 and the M1.
Cameraicon.png View gallery (14)
Highway Authority
Transport Infrastructure Ireland
Junction Type
Fork + roundabout
Opening Date
Roads Joined
M50, R132, R104
Junctions related to the R132
Junctions related to the R104

Coolock Interchange is now junction 2 of the M50, at the portal for Dublin Port Tunnel.

The interchange was built in June 1983 at the northern end of the 1.5 km Santry Bypass, which was then designated the N1. The road then ran west from this interchange to the original N1.

In 1985, the M1 to the airport from the interchange was completed and the original Santry Bypass came under motorway regulations, and this interchange became junction 2 of the M1.

The Dublin Port Tunnel opened in 2006, with its portal situated just to the south of the interchange, with traffic emerging under the interchange. The former Santry Bypass section, now over the tunnel, became a regular S2+1. The Port Tunnel and the section of the M1 south of of the M50, was designated as the M50. This means Coolock Interchange is now J2 of the M50.

While the ramps and road underneath have changed several times, the road over Coolock Interchange remains much as it did in 1983.

The interchange was included in every plan for the then-proposed M1 motorway, except for the very last version which advised that it wasn't needed. This version was produced too late to be carried forwards.

M50 Concession Ltd, who maintain the road, officially refer to the junction as Santry Rotary. TII, who are responsible for the road, call it Santry.


Route To Notes


(M1) Aerofort AIRPORT · Beal Feirste BELFAST Access from/to M50 north only



Calafort Átha Cliath DUBLIN PORT Tollan Dola TOLLED TUNNEL


An Lár CITY CENTRE · Calafort Átha Cliath DUBLIN PORT Still signed as N1 in places


An Chúlóg COOLOCK For Beaumont Hospital


Seantrabh SANTRY

Coolock Interchange
Related Pictures
View gallery (14)
M1 motorway southbound - Coppermine - 5202.JPGThe M1, but not for much longer! - Coppermine - 5199.JPGOld M1 looking north towards Turnapin.jpgDublin Port Tunnel southbound portal view looking south - Coppermine - 5200.JPGM50 northern exit of Dublin Port tunnel - Coppermine - 14350.JPG
Junctions on the M50
City  • 2 Coolock  • 3 Turnapin  • 4 Ballymun  • 5 Finglas  • 6 Blanchardstown  • 7 Palmerstown  • 9 Red Cow  • 10 Ballymount  • 11 Tallaght  • 12 Scholarstown  • Ballycullen • 13 Ballinteer  • 14 Sandyford  • 15 Carrickmines  • 16 Laughanstown  • 17 Junction 17

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