Junctions in Caernarfonshire

This is a list of junctions within the historic boundaries of Caernarfonshire.

• For a list of junctions maintained by Conwy Council, see Conwy Council (Junctions).
• For a list of junctions maintained by Gwynedd Council, see Gwynedd Council (Junctions).

Name	Location	Roads	Type
Treborth Interchange	Treborth	A55, A487	Folded dumbbell
Caernarfon Road Interchange	Goetre	A55, A4087	Diamond
Llys y Gwynt Interchange	Coed Hywel	A5, A55	Roundabout Interchange
Tal y Bont Interchange	Tan-y-lon	A55
Abergwyngregyn Interchange	Abergwyngregyn	A55	LILO
Madryn Interchange	Gorddinog	A55	LILO
Llanfairfechan Roundabout	Penmaen Park	A55	Roundabout
Penmaenmawr Junction	Penmaen	A55	Offslip + Onslip
Puffin Roundabout	Dwygyfylchi	A55	Roundabout
Dwygyfylchi Junction		A55	T-junction
Llandudno Junction Interchange	Llandudno Junction	A55, A546	Roundabout Interchange
Glan Conwy Interchange	Glanconwy	A55, A470, A547, B5381	Roundabout Interchange + Roundabout
Porthmadog roundabout	Bodawen	A487, A4971	Roundabout
Tremadog roundabout	Tremadog	A487, A498	Roundabout
Goat roundabout	Pitian Patian	A487, A499	Roundabout
Y Felinheli roundabout		A487, A4087, B4547	Roundabout
Plas Menai roundabout	Griffiths Crossing	A487	Roundabout
Cibyn roundabout	Cibyn	A487, A4086	Roundabout
St Davids roundabout	Caernarfon	A4871, B4419	Roundabout
Eagles junction	Caernarfon	A487, A4085	One-way system
Pont Seiont roundabout	Caernarfon	A4871	Roundabout
Meiford roundabout	Meiford	A487	Roundabout
Bontnewydd roundabout	Bontnewydd	A487	Roundabout
Bethel roundabout		B4366	Roundabout
Antelope Roundabout	Bangor	A5, A487	Roundabout
Conwy Morfa Interchange	Conwy	A55, A547	Diamond
Caeathro roundabout		A4085	Roundabout
Pen-y-Gwryd		A498, A4086