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|Length:||20 mi (30 km)|
|West end:||Nefyn, Gwynedd|
| A499 road
|East end:||Porthmadog, Gwynedd.|
Substantial improvements have been made to the A497 between Abererch, a mile or so east of Pwllheli and Llanystumdwy, a mile west of Criccieth. The new stretch of road has vastly improved access, especially for larger vehicles, to the Llŷn peninsula from the south.
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