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Grove Park Interchange

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Grove Park Interchange
Location Map ( geo)
The M4 Motorway River Usk crossing (3) - Geograph - 3340787.jpg
Cameraicon.png View gallery (5)
Location
St Julians, Newport
County
Monmouthshire
Highway Authority
Welsh Government
Junction Type
Fork
Roads Joined
M4, A4042
Junctions related to the A4042

Grove Park Interchange is junction 25A of the M4 in Newport, Monmouthshire. It came into being as a result of the Brynglas Tunnels and Malpas Road Relief scheme. As a result of that scheme, the primary A4042 was rerouted from Malpas Road onto a new alignment, partially following the old Monmouthshire Railway eastern valleys line. Where this route crosses the eastern mouth of the Brynglas Tunnels, a new roundabout was built (known as Grove Park Roundabout, along with sliproads connecting directly to the existing J25, which was then made limited-access. The intention was to prevent traffic from J25 travelling westbound through the tunnels, instead forcing them into a detour either to the north or south to gain access at J26 on the other side of Brynglas Hill.

Routes

Route To Notes

M4

Cardiff / Caerdydd access only from M4

M4

London, Chepstow / Cas-gwent

A4042

(M4 (W) / (Gn)), Cwmbran

A4042

Newport, Cardiff

A4042

Caerleon (B4596) spur to M4 J25





Grove Park Interchange
Related Pictures
View gallery (5)
M4 - Geograph - 1125138.jpgM4 - Geograph - 1125133.jpgBetween two bridges - Geograph - 1439793.jpgJ25a for Newport and about to head into a very narrow and old tunnel - Coppermine - 4942.jpgThe M4 Motorway River Usk crossing (3) - Geograph - 3340787.jpg
Junctions on the M4
Main RouteChiswick • 2 Brentford • 3 Cranford Parkway • 4 Heathrow • 4B Colnbrook • 5 Langley • 6 Tuns Lane • 7 Huntercombe • 8/9 Holyport • 10 Winnersh • 11 Three Mile Cross • 12 Theale • 13 Chieveley • 14 Wickham • 15 Plough Hill • 16 Spittleborough • 17 Stanton St Quinton • 18 Tormarton • 19 Hambrook • 20 Almondsbury • 21 Awkley • 22 Pilning • 23 Rogiet • 23A Magor • 24 Coldra • 25 Caerleon • 25A Grove Park • 26 Malpas • 27 High Cross • 28 Tredegar Park • 29 Castleton • 30 Pentwyn • 31 Junction 31 • 32 Coryton • 33 Cardiff West • 34 Miskin • 35 Pencoed • 36 Sarn • 37 Pyle • 38 Margam • 39 Groes • 40 Taibach • 41 Pentyla • 42 Earlswood • 43 Llandarcy • 44 Lon-Las • 45 Ynysforgan • 46 Llangyfelach • 47 Penllergaer • 48 Hendy • 49 Pont Abraham
Heathrow SpurCherry Lane • 4 Heathrow • 4A Concord
Former RoutesBray • 9A Cox Green • 9B The Thicket // 19 Hambrook • 19A Frenchay // 20 Almondsbury • 21 Aust • 22 Newhouse • 23 Magor // 28  Tredegar Park • 29 St Mellons
Defunct Newport
Bypass Proposal
23 Rogiet • 25 Glan Llyn • 27 Dock Way • 29 Castleton