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Turnapin Interchange

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Turnapin Interchange
Acomhal Thurnapain
Location Map ( geo)
The M50-M1 Interchange - Geograph - 1751853.jpg
A small part of the interchange.
Cameraicon.png View gallery (17)
Clonshagh / Turnapin Little
Highway Authority
Transport Infrastructure Ireland
Junction Type
Roundabout interchange + directional T
Opening Date
Roads Joined
M1, M50, R139
Junctions related to the N50

Turnapin Interchange is junction 1 of the M1 and junction 3 of the M50.

Aerial view of the interchange

When this section of the M1 was first built, there was a single overpass carrying an unclassified road at this point. This overpass then became the northern bridge of a standard roundabout interchange when the northern cross section of the M50 was built, which opened in December 1996. The M50 approach to the junction was built with two lanes, both of which joined the roundabout.

This junction had separate slips for M50 clockwise to M1 north and M50 anti-clockwise; however, in 2010 free-flow right-turn slips were built, creating a directional-T between the M1 and M50, with the old roundabout nestled inside it.

While the new layout has a high capacity, it still suffers from congestion, primarily due to traffic joining the motorway from the roundabout struggling to merge. This unusual layout, effectively a right-hand entrance, has necessitated several signs urging drivers to stay in lane.

The status of the road to the east of here, known as the Northern Cross Route Extension, has caused some confusion. It was designated N32, but the first section of it was a single carriageway road under motorway regulations, making it actually M32. The N32 became the R139 in 2012, and the road had its motorway status removed. Despite this, new signs have gone up calling it the M50! As of 2021, electronic VMS signage still refers to the exit as "N32".


Route To Notes


Aerfort AIRPORT · Béal Feirste BELFAST


Ó Dheas SOUTHBOUND · Gach Trae Eile ALL OTHER ROUTES For N2, N3, N4, N7


An Lár CITY CENTRE · Calafort Átha Cliath DUBLIN PORT Via tunnel


Mullach Íde MALAHIDE Formerly N32 (quondam M32)


Mullach Íde MALAHIDE Never signed as such.

Strip maps

Turnapin Interchange
Related Pictures
View gallery (17)
M1 SB - M50 SB new freeflow ramp - Coppermine - 23421.jpgEnd of the M1 at the M50 interchange - Coppermine - 23175.jpg2 M50 freeflow ramps M1 SB - M50 SB & M50 NB - M50 SB - Coppermine - 23422.jpgM50 between port tunnel and M1 TOTSO - Coppermine - 14351.JPGGantry sign on the M50 - Coppermine - 984.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
Junctions on the M1 and N1
Turnapin • 2 Cloghran • Airport • 3 Drinan • 4 Lissenhall • 5 Rowans Road • 6 Balbriggan • 7 Gormanston • 8 & 9 Drogheda South • 10 Drogheda North • 11 Monasterboice • 12 Hammondstown • 13 Mooremount • 14  Charleville • 15 Drumleck • 16 Southern Link • 17 Castleblayney Road • 18 Ballymascanlan (Ballymascanlan Roundabout • Faughart Roundabout • Major's Hollow) • 19 Feede Cross • 20 Flurrybridge

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