Your Route From Carmarthen SA31 to Bristol BS10
Route Summary
100 mi
1 hour 46 mins
5
24 Miles
25 Minutes
Recommended travel books and guides
The Great British Bucket List: Utterly Unmissable Britain
52 Great British Weekends: A Year of Mini Adventures
AA Easy Read Britain 2026 flexi bound
Lonely Planet Best Road Trips Great Britain
Great British Walkies: 100 brilliant dog walks
Where to Go When Great Britain and Ireland
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Route Map
Service Areas Along Route
Swansea West
M O T O, Swansea West Services, M4 Junction 47, Penllergaer, Swansea, West Glamorgan, SA4 9GT
Sarn Park
Sarn Park Motorway Services, Sarn Park Motorway Services Area, M4, Sarn, Bridgend, CF32 9SY
Cardiff West
Moto Services, Cardiff West Motorway Services Area, M4, Pontyclun, Mid Glamorgan, CF72 8SA
Cardiff Gate
Welcome Break Services, Malthouse Avenue, Cardiff Gate Business Park, Pontprennau, Cardiff, South Glamorgan, CF23 8RA
Magor
Magor Motorway Services Area, M4, Magor, Caldicot, Monmouthshire, NP26 3YL
Recommended motoring accessories for your car
HOTOR Car Boot Organiser
LISEN Retractable Car Phone Charger
Zacro Car Bin with 5 Garbage Bags
Lewis-Plast Premium 92 Piece First Aid Kit
iZEEKER 2.5K Dash Cam, 1440P QHD Car Camera
Car Seat Organiser
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Step-by-Step Directions
Head south-west on St Catherine St towards Model Ct
0.25
At the roundabout, take the 1st exit onto Morfa Ln/
0.25
At the roundabout, take the 2nd exit onto A4242
0.25
At the roundabout, take the 1st exit onto A40
0.5
At Pensarn Roundabout, take the 2nd exit onto A48
11.0
At Cross Hands Roundabout, take the 3rd exit and stay on A48
1.75
Continue onto A48
2.0
At the roundabout, take the 3rd exit onto M4 heading to Caerdydd/
80.75
Swansea West M O T O, Swansea West Services, M4 Junction 47, Penllergaer, Swansea, West Glamorgan, SA4 9GT
Sarn Park Sarn Park Motorway Services, Sarn Park Motorway Services Area, M4, Sarn, Bridgend, CF32 9SY
Cardiff West Moto Services, Cardiff West Motorway Services Area, M4, Pontyclun, Mid Glamorgan, CF72 8SA
Cardiff Gate Welcome Break Services, Malthouse Avenue, Cardiff Gate Business Park, Pontprennau, Cardiff, South Glamorgan, CF23 8RA
Magor Magor Motorway Services Area, M4, Magor, Caldicot, Monmouthshire, NP26 3YL
Last minute travel essentials
Travel Pillow Neck Pillow Memory Foam Travel Pillow
Rainberg Microfiber towel (180x90cm), Fast Drying
Mini Travel Pillow, Soft Down Alternative Pillows
BAGAIL Microfibre Travel Towel, Perfect Travel Towel
Pill Organizer,Pill Dispenser With 7 Large Compartments
Teskyer Electronics Accessories Organiser Bag, Waterproof
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At junction 20, exit towards Bristol(W)/
1.0
Slight right to merge onto M5
2.25
At junction 17, take the A4018 exit to Bristol (W)
0.25
At Cribbs Causeway Interchange, take the 1st exit onto Cribbs Causeway/
0.25
Turn left
0.0
Turn left
0.0
Turn right
0.0
Turn left
0.0
Arrive at your destination
Don't forget in-car food and drink essentials
HASAGEI Travel Mug, Insulated Coffee Cup with Leakproof Lid
Sistema KLIP IT PLUS Leakproof Food Storage Containers
Volhoply 14oz Insulated Stainless Steel Coffee Mug
Super Sparrow Water Bottle Stainless Steel - Insulated
Thermos - Stainless King Red Travel Flask (1.2L)
BeneLabel Snack Box, Stackable Snack Pot 4 Compartments
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