A5 Road Development Phase 1a
- Foilsithe: 16 Feabhra 2018
- An t-eolas is déanaí: 11 Aibreán 2025

The A5 Western Transport Corridor is an 85 km dual carriageway scheme traversing Northern Ireland from South of Derry/Londonderry to the border at Aughnacloy. The scheme is being delivered in phases; the first phase 1a is between New Buildings to Strabane North.
See Project Ireland 2040 (PDF, from page 41) for the full detail.