M3 Motorway (Great Britain) - Junctions

Junctions

Data from driver location signs are used to provide distance and carriageway identification information.

M3 motorway junctions
km m Northeastbound exits (B Carriageway) Junction Southwestbound exits (A Carriageway)
24.2 15.0 Road continues as A316 to London J1 Sunbury, Kingston A308
Non-motorway traffic
24.6 15.3 Sunbury, Kingston A308 Start of motorway
34.2 21.3 Gatwick (M23), Maidstone (M20), Stansted (M11), The North (M1), Heathrow (M4), Chertsey (A320), Staines (A30) M25 J2 Gatwick (M23), Maidstone (M20), Stansted (M11), The North (M1), Heathrow (M4), Chertsey (A320), Staines (A30) M25
45.2 28.1 Woking, Bracknell, Bagshot, Lightwater A322 J3 Woking, Bracknell, Bagshot, Lightwater A322
52.5 32.6 Guildford, Farnham, Camberley, Farnborough, Aldershot A331 J4 Guildford, Farnham, Camberley, Farnborough, Aldershot A331
55.4 34.4 Farnborough (West) A327
Fleet (A3013)
J4a Farnborough (West) A327
Fleet (A3013)
Fleet services Services Fleet services
67.4 41.9 Hook A287 B3349 J5 Hook A287 B3349
75.0 46.6 Basingstoke, Newbury, Alton A339
Reading (A33)
J6 Basingstoke, Newbury, Alton A339
83.3 51.8 Basingstoke A30 J7 Basingstoke A30
85.5 53.1 No access J8 The South West, Andover, Salisbury A303
96.4 59.9 Winchester services Services Winchester services
102.8 63.9 The Midlands, Newbury A34
Winchester A272
J9 The Midlands, Newbury A34
Winchester A272
105.0 65.2 Winchester (City) B3330
Alton A31
J10 No access
108.1 67.2 Winchester A3090
Twyford B3335
J11 Winchester A3090
Twyford B3335
112.6 70.0 Eastleigh (North) A335 J12 Eastleigh (North), Chandler's Ford A335
115.6 71.8 Eastleigh, Chandler's Ford A335 J13 Eastleigh A335
Start of motorway J14 Southampton, Portsmouth M27(E)
The West, Southampton Docks, Bournemouth M27(W)
Southampton A33

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