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Route information and related roads
Road details
About the M48
Approximate length13 miles
RouteBristol – Caldicot
Eastern endAwkley, M4
Western endMagor, M4
Major areasSevern Bridge, Chepstow, South Gloucestershire, Monmouthshire
Key connectionsM4, A466
Connecting roads
M48 planned closures and diversions
M48 services
Motorway services guide →Selected service areas from operator listings. Check the operator for current facilities, access and opening times.
How busy is the M48?
2025 annual average29,540vehicles a day
local authority boundary to local authority boundary · Gloucestershire
2,191 HGVs a day · 7.4% of traffic
Busiest published count location · both directionsM48 route and junction details
Selected junctions and connections. Check signs for permitted movements and current access.
Route context
- The Severn Bridge connects England and Wales. Welsh onward connections and traffic information are separately attributed; England’s National Highways coverage does not establish Wales-wide live coverage.
M48 traffic questions
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Where can I find M48 services?
The services section above lists service areas on the M48.
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