Live traffic alerts A40 : Both directions : Crickhowell : 11/05/26-18/05/26 1900-0700 : Start 11/05/2026 End 18/05/2026 A40 : Both directions : Crickhowell : 11/05/26-16/05/26 1900-0700 : Diversions in place : Start 11/05/2026 End 16/05/2026 A470 : Northbound : Taff's Well to Nantgarw : Road closed : 11/05/26-23/05/26 2000-0600 : Diversions in place : Start 11/05/2026 End 23/05/2026 M4 : Eastbound : J45 Ynysforgan : Onslip closed : 13/05/26-16/05/26 2000-0600 : Start 13/05/2026 End 16/05/2026 A55 : Eastbound : J7 Gaerwen : Offslip closed : Onslip closed : 15/05/26-16/05/26 1900-0600 : Diversions in place : Start 15/05/2026 End 16/05/2026 A40 : Both directions : Crickhowell : 16/05/26-18/05/26 0700 : FULL WEEKEND CLOSURE : Diversions in place : Start 16/05/2026 End 18/05/2026 A40 : Eastbound : Monmouth Dixton R/bout to Servicebridge : 14/04/26-30/06/26 0600 : Contraflow : Start 14/04/2026 End 30/06/2026 A487 : Both directions : Aberystwyth Commins Coch : Improvement work : Temporary traffic lights : 02/02/26-23/06/26 0900-1600 : Start 02/02/2026 End 23/06/2026 A40 : Eastbound : Westbound : Abergavenny Hardwick R/bout to Abergavenny : 04/03/26-25/06/26 0930-1530 : Roadworks : STOP/GO in use : Start 04/03/2026 End 25/06/2026 M4 : Eastbound : M4 St Julians Viaduct : 27/04/26-30/11/26 0600 : Start 27/04/2026 End 30/11/2026 OF View more live traffic alerts