A3 and A3(M)

The A3 is the historic route south-west from London to Portsmouth, connecting the capital with the home of the navy. Upgrades have been happening to it since the early part of the 20th Century, but since the 1960s, it has been turned into a near-motorway (in fact, at one time there were plans afoot to renumber M3 as M30 to free up that number for a fully upgraded A3).

However, appearances are deceptive - the Esher Bypass, which is a full motorway formation, is the exception and much of the route has occasional right-turns. Until 2011, of course, Hindhead formed the most notorious bottleneck - the one place the road returned to a single-carriageway, snaking through a village, protected National Trust woodland and a set of traffic lights. After five years of work, a tunnel under the Site of Special Scientific Interest closed the gap that had prevented this route from reaching its full potential for so long.

The short blue line at the Portsmouth end of the A3 is an entirely isolated motorway, rather like the M2. This one just bypasses a nasty bit of the A3 through Waterlooville and Horndean, though it does it in considerable style in comparison to the rest of the route, which is almost motorway standard but certainly not a motorway.

The M27 stops just four miles short of reaching the A3(M), throughout which it is four lanes wide, grade separated and has very nearly full width hard shoulders. Despite some pieces of road (like the A57(M) or Chiswick flyover section of M4) being a long way below this standard, the fact that its hard shoulders are a few inches too narrow is apparently the official reason for its reluctance to turn blue.

The A3(M)'s number gives you a headache if you think about it too long. It implies that this is a section of the A3 with motorway restrictions. However, running parallel through Waterlooville is the A3. So that means... two A3's? Erm...

You're not looking at the whole A3 and A3(M)

This page is about the parts of the A3 and A3(M) that are designated a motorway or that have motorway characteristics. Other sections of this road will not be featured here and will not count towards the length of the road as shown below.

Start
London
End
Portsmouth
Passes
Kingston, Guildford, Petersfield
Connects to
Length
62 miles
Open Junctions Section
Nov 1979 J1-5 Horndean and Waterlooville Bypass

Exit list

Some minor side turnings and property accesses don't appear here.

Junction   Northbound               Southbound  
Central London
Wandsworth
A3
NORTH
A3
Beaumont Road
LanesLanesLanesLanesLanes Signs LanesLanesLanesLanes Signs
0.25 miles, 3 lanes 0.25 miles, 3 lanes
Hammersmith
Fulham
Putney
Wimbledon
Merton Park
A219
A219 A219 Fulham
Putney
Wimbledon
Merton Park
A219
LanesLanesLanesLanesLanes LanesLanesLanesLanesLanes
0.5 miles, 3 lanes 0.5 miles, 3 lanes
Richmond
Roehampton
A306
A306 Richmond
Roehampton
A306
LanesLanesLanesLanesLanes Signs LanesLanesLanesLanesLanes Signs
0.5 miles, 3 lanes 0.5 miles, 3 lanes
Putney Vale Putney Vale
LanesLanesLanesLanes LanesLanesLanesLanesLanes
0.5 miles, 2 lanes 0.5 miles, 2 lanes
Kingston-upon-Thames
A308
A308 Kingston-upon-Thames
A308
LanesLanesLanesLanes Signs LanesLanesLanesLanes
0.5 miles, 2 lanes 0.5 miles, 2 lanes
LanesLanesLanesLanesLanes Signs LanesLanesLanesLanes Signs
1 mile, 3 lanes 1 mile, 3 lanes
Kingston
Wimbledon
Merton Park
Raynes Park
A238
A238 A238 Kingston
Wimbledon
Merton Park
Raynes Park
A238
LanesLanesLanesLanesLanes LanesLanesLanesLanesLanes
1 mile, 3 lanes 1 mile, 3 lanes
Wimbledon
A298
A298


Wimbledon (A298)
Raynes Park
New Malden (B282)
LanesLanesLanesLanesLanes LanesLanesLanesLanesLanes
0.1 miles, 3 lanes 0.1 miles, 3 lanes
New Malden
Raynes Park
B282
B282

B282

LanesLanesLanesLanesLanes
0.5 miles, 3 lanes 0.5 miles, 3 lanes
New Malden
Worcester Park
A2043
A2043 A2043 New Malden
Worcester Park
A2043
LanesLanesLanesLanesLanes LanesLanesLanesLanesLanes
2.5 miles, 3 lanes 2.5 miles, 3 lanes
Kingston-upon-Thames
Reigate
Sutton
Epsom
A240
A240 A240 Kingston-upon-Thames
Reigate
Sutton
Epsom
A240
LanesLanesLanesLanesLanes LanesLanesLanesLanesLanes
1 mile, 3 lanes 1 mile, 3 lanes
0.0 km A243

A309
A243


Dorking
Leatherhead
A243
Staines
Esher
A309
LanesLanesLanesLanesLanes LanesLanesLanesLanesLanes Signs
1 mile, 2 lanes  
1.3 km
LanesLanesLanesLanesLanes Signs
2.5 miles, 3 lanes 3.5 miles, 3 lanes
5.7 km Esher
Leatherhead
A244
A244 A244 Esher
Leatherhead
A244
LanesLanesLanesLanesLanes LanesLanesLanesLanesLanes
3 miles, 3 lanes 3 miles, 3 lanes
10.6 km Woking
Weybridge
Cobham
A245
A245 A245 Woking
Weybridge
Cobham
A245
LanesLanesLanesLanesLanes LanesLanesLanesLanesLanes
1.5 miles, 3 lanes 1.5 miles, 3 lanes
12.8 km Gatwick Airport (M23 Link)
Heathrow Airport (M4 Link)
Dartford & M20 Link
The NORTH (M1 Link)
M25 Link
M25 M25 Gatwick Airport (M23 Link)
Heathrow Airport (M4 Link)
Dartford & M20 Link
The NORTH (M1 Link)
M25 Link
LanesLanesLanesLanesLanes LanesLanesLanesLanesLanes
5.5 miles, 3 lanes 1.5 miles, 3 lanes
15.1 km B2215 B2039 Ripley
B2215
LanesLanesLanesLanesLanes
   
20.2 km Ripley
Woking
A247
B2215


A247
A247
LanesLanesLanesLanesLanes
4.5 miles, 3 lanes 5.5 miles, 3 lanes
21.6 km A3100 Merrow
Burpham
A3100
LanesLanesLanesLanesLanes
  3 miles, 3 lanes
24.9 km A320 A25

A320

A25
Guildford A25
Horsham (A281)
Woking A320
LanesLanesLanesLanesLanes Signs LanesLanesLanesLanesLanes Signs
0.5 miles, 2 lanes  
26.4 km Guildford (N, S & Cen)
Brookwood
A25
A322
(A323)
A25
LanesLanesLanesLanes
0.5 miles, 2 lanes 1 mile, 2 lanes
27.4 km Guildford (W)
University of Surrey
Cathedral
Guildford (W)
University of Surrey
Cathedral
LanesLanesLanesLanes LanesLanesLanesLanes
0.5 miles, 2 lanes 0.4 miles, 2 lanes
27.9 km Wilderness Road
LanesLanesLanesLanes
  0.1 miles, 2 lanes
28.8 km Beechcroft Drive Manor Way
LanesLanesLanesLanes LanesLanesLanesLanes
1.5 miles, 2 lanes 0.5 miles, 2 lanes
29.5 km A31 A31 Farnham
Aldershot (A331)
A31
Signs LanesLanesLanesLanes Signs
  1 mile, 2 lanes
Farnham
Aldershot
B3000 (A31)
B3000
(A31)
B3000 Godalming
B3000
LanesLanesLanesLanes LanesLanesLanesLanes
1.5 miles, 2 lanes 1.5 miles, 2 lanes
Hurtmore
Norney
Hurtmore
Norney
LanesLanesLanesLanes LanesLanesLanesLanes
1.5 miles, 2 lanes 1.5 miles, 2 lanes
Godalming
Milford
A286
B3001 A286 Milford
A286
LanesLanesLanesLanes LanesLanesLanesLanes
1.5 miles, 2 lanes  
A3100
  1.5 miles, 2 lanes
Borough Farm Road Webb Road
LanesLanesLanesLanes LanesLanesLanesLanes
1.5 miles, 2 lanes 0.5 miles, 2 lanes
Witley Common
LanesLanesLanesLanes
  1 mile, 2 lanes
Thursley Thursley
LanesLanesLanesLanes LanesLanesLanesLanes
3.5 miles, 2 lanes  
Hindhead Tunnel Hindhead Tunnel
Signs Signs
  3.5 miles, 2 lanes
Hindhead
Haslemere (A287)
Grayshott
A333
A333
(A287)


Hindhead
Grayshott
A333
LanesLanesLanesLanes LanesLanesLanesLanes
1 mile, 2 lanes 1 mile, 2 lanes
Access only Access only
LanesLanesLanesLanes LanesLanesLanesLanes
2 miles, 2 lanes 2 miles, 2 lanes
Liphook
B2070
B2070 Liphook
B2070
LanesLanesLanesLanes LanesLanesLanesLanes
2 miles, 2 lanes 2 miles, 2 lanes
Griggs Green
Liphook
Griggs Green
LanesLanesLanesLanes LanesLanesLanesLanes
1.5 miles, 2 lanes 1.5 miles, 2 lanes
Farnham
Greatham
Whitehill
A325
A325


Greatham
A325
LanesLanesLanesLanes LanesLanesLanesLanes
1.5 miles, 2 lanes 1.5 miles, 2 lanes
Selborne
Liss
B3006
B3006 B3006 Selborne
Liss
B3006
LanesLanesLanesLanes LanesLanesLanesLanes
1.5 miles, 2 lanes 1.5 miles, 2 lanes
Liss Liss
LanesLanesLanesLanes LanesLanesLanesLanes
2 miles, 2 lanes 2 miles, 2 lanes
Petersfield
Midhurst
A272
A272 Petersfield
Midhurst
A272
LanesLanesLanesLanes LanesLanesLanesLanes
1.5 miles, 2 lanes 1.5 miles, 2 lanes
Winchester
Alton (A32)
A272
A272
(A32)
Winchester
A272
LanesLanesLanesLanes LanesLanesLanesLanes
2 miles, 2 lanes 2 miles, 2 lanes
Petersfield
B2070
Buriton
B2070 Buriton
LanesLanesLanesLanes LanesLanesLanesLanes
2.5 miles, 2 lanes 2.5 miles, 2 lanes
Clanfield
Chalton
Clanfield
Chalton
LanesLanesLanesLanes LanesLanesLanesLanes
2 miles, 2 lanes 2 miles, 2 lanes
1
9.0 km
A3(M) becomes A3 A3

A3 becomes A3(M)
Horndean
A3
Signs LanesLanesLanesLanes Signs
1 mile, 2 lanes 1 mile, 2 lanes
2
7.6 km
Horndean
Lovedean
B2149
B2149 B2149 Havant
Lovedean
B2149
LanesLanesLanesLanes LanesLanesLanesLanes
2 miles, 2 lanes 2 miles, 2 lanes
3
3.8 km
Waterlooville
Denmead
B2150
B2150 B2150 Waterlooville
Havant
B2150
LanesLanesLanesLanes LanesLanesLanesLanes
1 mile, 2 lanes 1 mile, 2 lanes
4
2.3 km
Widley
Havant
LanesLanesLanesLanesLanes LanesLanesLanesLanesLanes
1 mile, 3 lanes 1 mile, 3 lanes
0.0 km N/A A2030

A27






SOUTH
B2177

A27





Portsmouth
Fareham
A27 (M27 Link)
Drayton
Cosham
A2030
Chichester (A27)
LanesLanesLanesLanesLanes Signs LanesLanesLanesLanesLanes Signs
Routes

Picture credits

With thanks to Matthew Smith, Andy, Mark Baker, Ritchie Swann and Robert Bollen for information on this page.