M3 motorway (Great Britain)
|Part of E05|
|Length:||58.6 mi (94.3 km)|
|Existed:||1971 – present|
J2 → M25 motorway Junction 12
J14 → M27 motorway Junction 4
|Staines-upon-Thames, Bracknell, Basingstoke, Winchester|
The M3 is an English motorway that runs from Sunbury-on-Thames, Surrey, to Southampton, Hampshire, a distance of approximately 59 miles (95 km). Its section from Southampton to the A34 trunk road junction (also for north Winchester) is in the north-south European route E05 (which is unsigned). The motorway is dual three-lane, except from Junction 8 (A303 road) near Basingstoke to Junction 9 near Winchester where it is dual two-lane. It was opened in sections starting in 1968 and was eventually completed in 1995 in the face of widespread opposition to the short section southeast of Winchester that passes through Twyford Down.
Originally approved as the "London to Basingstoke Motorway" with delays over funding for an extension to Southampton the road was built to relieve two single carriageway trunk roads that were congested.[n 1]
In 1967 sections of the A33 road from Popham, Hampshire to a northeastern point of the Winchester Bypass were being widened to dual carriageway however this only partially alleviated growing congestion especially in Winchester which led to the southern phase gaining approval.[n 2]
Eastern section 
The eastern section, from Sunbury-on-Thames in Surrey to Popham near Basingstoke opened in sections, first the Hampshire section in 1971 and then the Surrey section in 1974. The cost for this first phase was £46m. The completed road acts as a continuation of the A316 Country Way an express three-lane road from Apex Corner, Whitton, Twickenham in Greater London to Sunbury-on-Thames.
Southern section 
A first public inquiry for the "M3 London to Basingstoke Motorway: Popham to Compton extension" centred on the section passing Winchester and was held in 1971 under which the ministry was instructed to reconsider and reconsult on the proposals. A second public inquiry was held in 1976–77. The earlier decision to route the motorway through or alongside the water meadows between St Catherine’s Hill and the compact cathedral city was reopened and during the year-long inquiry the headmaster of Winchester College was forcibly ejected along with others for causing a disturbance.
The scope of the M3 extension was reduced to defer the difficult decision about the section around Winchester and it was built in two sections (from 'Popham to Bridget's Farm' and from 'Bridget's Farm to Bar End') in 1995. When this opened, the temporary junction to the A33 parallel route was removed.
The section of the M3 from near Junction 12 (Eastleigh and Chandler's Ford) to the last, J14 for the M27 motorway: Junction 4 replaced part of the A33 road which was upgraded to motorway standard and opened in 1991.
The southern section starts as a continuation of a single-lane avenue, Bassett Avenue and The Avenue in the City of Southampton as the M27 motorway provides alternative routes from other parts of the city, particularly its waterfront and downtown peak-hour accessway, the M271 motorway and Mountbatten Way providing dual to three lane highways starting at the northwest of the city.
Abandoned/suspended proposals 
Detailed route 
The M3 starts at Sunbury-on-Thames in Surrey on the edge of South West London as the continuation of the A316 which has three lanes each way from Whitton, Twickenham in Outer London, and two from Richmond Circus. The motorway 2 miles (3.2 km) after its start turns more west-southwest, crosses the River Thames on the M3 Chertsey Bridge to the north of Chertsey and then has its second junction, at the M25 motorway, before continuing through the gorse, bogs and heather of the Surrey Heath. Its third junction is for Camberley, Bagshot, Bracknell, Ascot and Worplesdon. From Junction 4 it bisects the northern Blackwater Valley conurbation[n 3] then has its latest junction for Fleet and nearby early 21st century expanded/new villages[n 4], it crosses the South West Main Line, before skirting Old Basing and Basingstoke to its north[n 5]. Turning south west again, it passes Popham and, just before reaching Junction 8, where one lane becomes the A303 road, the motorway continues as a dual two lane road through open countryside and Micheldever Wood until it reaches the north of Winchester.
Taking over the "Winchester Bypass" the M3 resumes to three lanes each way at Junction 9, continues directly south and then takes a small curve around the east of the city running through a deep cutting in Twyford Down and then proceeding south west again, crossing the South West Main Line a second time alongside the River Itchen and through the Eastleigh urban-surburban area before crossing the Eastleigh to Romsey railway line and ending at the Chilworth Roundabout on the edge of Southampton.
Road features 
- The Spitfire Bridge carries the B3404 Alresford Road to Winchester over the M3 motorway and the parallel A272 (J9-J10 spur). This is known as the "Spitfire Link". It replaced a concrete parabolic arch bridge under which a Curtiss P-40 had been flown by George Rogers in October 1941. It was generally assumed locally that the aircraft had been a Spitfire hence the name.
- A private exit of the northern roundabout connected to Junction 4a provides access to the UK headquarters of Sun Microsystems.
- The largely residential Camberley A325 unusually forms a roundabout over the M3 between Junctions 3 and 4, to access local residential roads.
In the early morning of 25 April 1999, the drum and bass DJ and record producer known as Kemistry was killed on the M3 near Winchester by the steel body of a cat's eye, which had been dislodged by a van and flew through the windscreen of the following car in which she was a passenger. The coroner recorded a verdict of accidental death. A question was asked in the House of Lords about the safety of cat's eyes in light of the highly unusual incident, and the Highways Agency conducted an investigation into the "long-term integrity and performance" of various types of road stud.
|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
|15.3||24.6||Sunbury, Kingston A308||Start of motorway|
|21.3||34.2||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|
|28.1||45.2||Woking, Bracknell, Bagshot, Lightwater A322||J3||Woking, 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||Services||Fleet services|
|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 A303|
|59.9||96.4||Winchester services||Services||Winchester services|
|63.9||102.8||The Midlands, Newbury A34 trunk road
Winchester A272, Alresford A31
|J9||The Midlands, Newbury A34 trunk road
|65.2||105.0||Winchester (City) B3330
Alton, Alresford A31
|70.0||112.6||Eastleigh (North) A335||J12||Eastleigh (North), Chandler's Ford A335|
|71.8||115.6||Eastleigh, Chandler's Ford A335||J13||Eastleigh A335|
|Start of motorway||J14||Southampton , Portsmouth M27(E)
The West, Southampton Docks, Bournemouth M27(W)
See also 
Notes and references 
- *The A30 eastern stretch to the A303 road
*The Winchester to Southampton traditional road, the A33
- Of the A34 trunk road from Bicester on the M40 to Southampton
- Main settlements: Farnborough, Aldershot, Frimley, Farnham and Sandhurst
- Examples include Elvetham Heath
- Here the M3 passes close to the Basingstoke Canal
- "The M.3 Motorway". Hansard. 1967.
- "The M.3 Motorway". Hansard. 1967. Oral Questions in the House of Lords 21 June 1967 vol 283 cc1385-7
- "M3 London to Southampton Route Management Strategy". Department for Transport.
- "M3 (Sunbury-Popham)". Hansard. 1988.
- "M3 London to Basingstoke Motorway: Popham to Compton public inquiry". National Archives.
- "M3. London to Southampton". The Motorway Archive.
- Morgan Morgan-Giles (26 July 1976). "M3 MOTORWAY INQUIRY". Hansard. Retrieved 11 March 2013.
- "M3 London to Basingstoke motorway: Popham to Compton; public inquiry 1976". National Archives.
- "Annual Average Daily Traffic Flows". Department for Transport. Retrieved 28 September 2009.
- "Basingstoke". Motorway Services Online. Retrieved 31 December 2011.
- Highways Agency – "M3 London to Southampton Route Management Strategy". Highways Agency.
- Grid Reference Finder distance tools
- "Myth of pilot's bridge stunt". Southern Daily Echo. 31 October 2003.
- "Off Site Highway Works and Contributions – Report of the County Surveyor". Roads & Development Sub-committee. Hampshire County Council. 26 October 1998. Retrieved 23 March 2008.[dead link]
- "DJ killed by flying motorway Cat's-eye". Southern Daily Echo. Retrieved 11 November 2009.
- Parliamentary Debates, House of Lords, 13 December 1999, column WA20.
- "Police hunt motorway jokers". BBC News. 1 April 2000. Retrieved 23 March 2008.
- Area 3 Driver Location Signs (map) – Highway Authority, 2009
|Wikimedia Commons has media related to: M3 motorway|
- Chris's British Road Directory[Discuss – April 2013]
- The Motorway Archive – M3