M3 motorway (Great Britain)

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M3 shield

M3
Looking south at Twyford Down
Route information
Part of
Maintained by Highways England
Length58.6 mi (94.3 km)
Existed1971–present
HistoryOpened: 1971
Completed: 1995
Major junctions
Northeast endSunbury-on-Thames
51°25′00″N 0°25′26″W / 51.4166°N 0.4240°W / 51.4166; -0.4240 (M3 motorway (northeastern end))
 Junction 2.svg UK-Motorway-M25.svg
J2 → M25 motorway
Junction 14.svg UK-Motorway-M27.svg
J14 → M27 motorway
Southwest endChilworth
50°57′16″N 1°24′29″W / 50.9545°N 1.4081°W / 50.9545; -1.4081 (M3 motorway (southwestern end))
Location
CountiesSurrey, Hampshire
Primary
destinations
Basingstoke
Winchester
Southampton
Road network
M2M4

The M3 is a motorway between Sunbury-on-Thames and Southampton in England. It links London with Southampton and Portsmouth, as well as South West England. It is about 59 miles (95 km) long.

Junctions[change | change source]

M3 motorway junctions
miles km North-east bound exits (B carriageway) Junction South-west bound exits (A carriageway)
15.0 24.2 Road continues as A316 to London J1 Sunbury, Kingston A308
Non-motorway traffic
15.3 24.6 Sunbury, Kingston A308 Start of motorway
21.3 34.2 Gatwick HeathrowM25 (M23), (M4) J2 Gatwick, Heathrow (M23, M4) M25
28.1 45.2 Woking, Bracknell, Camberley, Bagshot, Lightwater A322 J3 Woking, Camberley, Bracknell, Bagshot, Lightwater A322
32.6 52.5 Guildford, Farnham, Camberley, Farnborough, Aldershot A331 J4 Guildford, Farnham, Camberley, Farnborough, Aldershot A331
34.4 55.4 Fleet (A3013), Farnborough (West) A327 J4a Fleet (A3013), Farnborough (West) A327
Fleet services (Welcome Break) Services Fleet services (Welcome Break)
41.9 67.4 Hook A287 B3349 J5 Hook A287 B3349
46.6 75.0 Basingstoke, Reading (A33), Alton A339
J6 Basingstoke, Newbury, Reading, Alton A339
51.8 83.3 Basingstoke A30 J7 Basingstoke A30
53.1 85.5 No access J8 The South West, Andover, Salisbury, Exeter A303
59.9 96.4 Winchester services (Moto) Services Winchester services (Moto)
63.9 102.8 The Midlands, Newbury A34 trunk road
Winchester A272, Alresford A31
J9 The Midlands, Newbury A34 trunk road
Winchester A272
65.2 105.0 Winchester (City) B3330
Alton, Alresford A31
J10 No access
67.2 108.1 Winchester A3090
Twyford B3335
J11 Winchester A3090
Twyford B3335
70.0 112.6 Eastleigh (North) A335 J12 Eastleigh (North), Chandler's Ford A335
71.8 115.6 Eastleigh, Chandler's Ford A335 J13 Bournemouth M27(W)
Eastleigh A335
Start of motorway J14 Southampton Airport interchange, Portsmouth M27(E)
The West, Southampton Docks,
Southampton A33
Notes
  • Distances in kilometres and carriageway identifiers are taken from driver location signs/location marker posts. Where a junction goes across several hundred metres and the data is available, both the start and finish values for the junction are shown.
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


KML is from Wikidata