A4143

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A4143
Location Map ( geo)
Cameraicon.png View gallery (7)
From:  Llanfoist (SO292134)
To:  Abergavenny (SO292145)
Distance:  0.7 miles (1.1 km)
Meets:  A465, B4246, A40
Former Number(s):  A465
Highway Authorities

Monmouthshire

Traditional Counties

Monmouthshire

Route outline (key)
A4143 Llanfoist - Abergavenny
Roundabout on the A4143, seen from the Waitrose carpark

The A4143 is a short road connecting Llanfoist and the A465 Heads of the Valleys Road (southern bypass of Abergavenny) to the A40 west of Abergavenny town centre.

The route starts in Llanfoist at a roundabout junction with the B4246 and with the off- and on-slips of the westbound A465: part of a larger grade-separated junction with the Heads of the Valleys Road at this location. After passing beneath the main line of the A465, the A4143 meets a link to the off- and on-slips of the eastbound A465 at a second roundabout, which also serves a Waitrose supermarket.

Almost immediately after this, our route (Merthyr Road) crosses the river by the stone-arched Usk Bridge, dating back to 1563 though much widened and strengthened over the years. So far, from Llanfoist to the northern end of the bridge, the A4143 has followed the old, pre-bypass alignment of the A465. However, beyond the bridge Merthyr Road (the old main route into Abergavenny) now swings off to the right (as a detached portion of the B4246) at a third roundabout, and the A4143 continues ahead along a new build following the former alignment of the Merthyr, Tredegar and Abergavenny Railway (closed in 1958) to terminate on the A40 some 500 metres further north.

An amended OpenStreetMap trace for this route awaits uploading to the SABRE Wiki.

A4143
Junctions
Crossings
Places
Related Pictures
View gallery (7)
Usk Bridge over Dolau Meadows - Geograph - 355839.jpgUsk Bridge - Geograph - 2254342.jpgStone bridge across the Usk, Abergavenny - Geograph - 2157811.jpgRiver Usk at Llanfoist - Geograph - 2017159.jpgEvidence of previous bridges across the River Usk - Geograph - 2015590.jpg
Other nearby roads
Abergavenny
A4100-A4199
A4100 • A4101 • A4102(W) • A4102(E) • A4103 • A4104 • A4105 • A4106 • A4107 • A4108 • A4109 • A4110 • A4111 • A4112 • A4113 • A4114 • A4115 • A4116 • A4117 • A4118 • A4119
A4120 • A4121 • A4122 • A4123 • A4124 • A4125 • A4126 • A4127 • A4128 • A4129 • A4130 • A4131 • A4132 • A4133 • A4134 • A4135 • A4136 • A4137 • A4138 • A4139
A4140 • A4141 • A4142 • A4143 • A4144 • A4145 • A4146 • A4147 • A4148 • A4149 • A4150 • A4151 • A4152 • A4153 • A4154 • A4155 • A4156 • A4157 • A4158 • A4159
A4160 • A4161 • A4162 • A4163 • A4164 • A4165 • A4166 • A4167 • A4168 • A4169 • A4170 • A4171 • A4172 • A4173 • A4174 • A4175 • A4176 • A4177 • A4178 • A4179
A4180 • A4181 • A4182 • A4183 • A4184 • A4185 • A4186 • A4187 • A4188 • A4189 • A4190 • A4191 • A4192 • A4193 • A4194 • A4195 • A4196 • A4197 • A4198 • A4199
Former iterations: A4105(W) • A4105(E) • A4108 • A4114 • A4115 • A4116 • A4125 • A4141 • A4150 • A4154 • A4160 • A4168