{{UK motorway routebox|
| motorway= A48(M)
| length-mi= 2
| length-km= 3.2
| direction= East - West
| start= Castleton
| destinations= Cardiff
| end= St_Mellons
| opening-date= 1977
| completion-date= 1977
| junctions= 29 - 50px
M4_motorway }} The '''A48(M)''' is a Motorway in Cardiff & Newport, Wales. It is a spur off the M4 towards Cardiff. It is 2 miles (3.2Km) long. At St_Mellons it runs continuously into a further 6 miles of the grade-separated A48, which also features (albeit narrow) hard shouldersPathetic Motorways - A48(M). It opened in 1977The Motorway Archive - M4 Dates, originally as an ending for the M4. The M4 was subsequently extended from junction 29 in 1980 and this section of road was renumbered A48(M). It has been suggested that its continuation westwards was projected to be from St Mellons, as maps from the period show{{specify}}. ==Junctions== {| border=1 cellpadding=2 style="margin-left:1em; margin-bottom: 1em; color: black; border-collapse: collapse; font-size: 95%;" |- align="center" bgcolor="0080d0" style="color: white;font-size:120%;" | colspan="3" | '''A48(M) Motorway''' |- align="center" bgcolor="000000" style="color: white" | Eastbound exits | Junction | Westbound exits |- align="center" | Bristol, Severn Crossing '''M4''' | M4 J29 | ''Start of Motorway'' |-align="center" |''Start of Motorway'' | rowspan="2"| J29A | ''No Exit'' |- align="center" | Castleton '''A48''' | ''Road continues as '''A48''' to Cardiff'' |} ==Other A48(M)s== *A 6 mile motorway, the Port_Talbot bypass was opened in 1967 had also formerly been numbered A48(M) before incorporation into the M4's westward extension in the 1970sPathetic Motorways - A48(M) Port Talbot Bypass. *Another A48(M) is shown on some maps as the Morriston bypass, but its existence has been controversialThe Motorway Archive - A48(M) Morriston Bypass. ==Trivia== *There is an abandoned carrigeway at M4 Junction 29, whose existence has not been definitively explainedCBRD Motorway Database - A48(M). *The A48(M) has the unusual feature that it has no junction options: at both ends it just leads into limited-access junctions. == See also == *List_of_motorways_in_the_United_Kingdom ==References==
==External links==
* CBRD Motorway Database - A48(M)
* Pathetic Motorways - A48(M)
* Google Local Aerial Shot Of Abandoned Carrigeway
{{Template:UK motorways}}
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4-0048
Sv:A48(M)
M4_motorway }} The '''A48(M)''' is a Motorway in Cardiff & Newport, Wales. It is a spur off the M4 towards Cardiff. It is 2 miles (3.2Km) long. At St_Mellons it runs continuously into a further 6 miles of the grade-separated A48, which also features (albeit narrow) hard shouldersPathetic Motorways - A48(M). It opened in 1977The Motorway Archive - M4 Dates, originally as an ending for the M4. The M4 was subsequently extended from junction 29 in 1980 and this section of road was renumbered A48(M). It has been suggested that its continuation westwards was projected to be from St Mellons, as maps from the period show{{specify}}. ==Junctions== {| border=1 cellpadding=2 style="margin-left:1em; margin-bottom: 1em; color: black; border-collapse: collapse; font-size: 95%;" |- align="center" bgcolor="0080d0" style="color: white;font-size:120%;" | colspan="3" | '''A48(M) Motorway''' |- align="center" bgcolor="000000" style="color: white" | Eastbound exits | Junction | Westbound exits |- align="center" | Bristol, Severn Crossing '''M4''' | M4 J29 | ''Start of Motorway'' |-align="center" |''Start of Motorway'' | rowspan="2"| J29A | ''No Exit'' |- align="center" | Castleton '''A48''' | ''Road continues as '''A48''' to Cardiff'' |} ==Other A48(M)s== *A 6 mile motorway, the Port_Talbot bypass was opened in 1967 had also formerly been numbered A48(M) before incorporation into the M4's westward extension in the 1970sPathetic Motorways - A48(M) Port Talbot Bypass. *Another A48(M) is shown on some maps as the Morriston bypass, but its existence has been controversialThe Motorway Archive - A48(M) Morriston Bypass. ==Trivia== *There is an abandoned carrigeway at M4 Junction 29, whose existence has not been definitively explainedCBRD Motorway Database - A48(M). *The A48(M) has the unusual feature that it has no junction options: at both ends it just leads into limited-access junctions. == See also == *List_of_motorways_in_the_United_Kingdom ==References==