List of A roads in zone 3 in Great Britain starting west of the A3 and south of the A4 (roads beginning with 3).

Single- and double-digit roads RoadFromToLength Notes The Monument, London Portsmouth A large majority is a trunk road. Its southern parallel motorway is designated the A3(M). Hounslow, West London Land's End Replaced for between Popham and the Bullington interchange by the A303 trunk road southwest of Basingstoke. A trunk road west of Exeter. Previously went via A343, Salisbury Road (old A343), B3042 (old A303), A3057, London Road (old B3400), B3400, and city streets (old A33) between Lopcombe Hill and Basingstoke, but this was changed as part of a renumbering of roads in the area. Replaced for 5 miles by M5 (J29 - J31) near Exeter. Guildford Bere Regis Near the M3 its Romsey and Winchester portion is replaced by:• the J10 to J11, M3, Winchester• The A3090 from J11 to Ower in the New Forest District — a winding route covering in . Gosport Alton All in Hampshire Winchester Reading Resumes in Southampton as various roads such as the arterial road alongside Southampton Dock. Winchester Salford Most of the section between Oxford and Solihull is arguably the A44 and the A3400 however its modern course ends northeast to join the M40 from which the northern part of the road can be accessed after one junction of the M42 motorway. A trunk road to Oxford and between Stafford and Stoke on Trent. Southampton Honiton Originally went southwest from Charmouth to Clyst St Mary along what is now the A3052. Southampton Bath Dorchester Bristol Broken in two past the former Roman town of Ilchester by a bypass which is a small fraction of the A303 Bodmin Mansfield Replaced by J27 to J31, M5 past Exeter. Replaced in Birmingham by a shorter parallel road into the city centre, the A38(M). A dual carriageway in South Devon, Staffordshire and Derbyshire. The longest 2-digit A road in the UK, at 292 miles. Newton Park near Bath Falmouth

Triple-digit roads

RoadFromTo Notes Upper Thames Street, City of London Newington Causeway, near Elephant & Castle Southwark Bridge Aldwych St George's Circus Waterloo Bridge Hyde Park Corner, London Elephant & Castle In two parts. 1. The London Inner Ring Road at Grosvenor Place to the Victoria one way system. 2. Victoria Street, half of Parliament Square and then Bridge Street (Westminster Bridge), followed by part of Westminster Bridge Road (which replaced part of the A23) and finally St George's Road (one way (north-west)) past St George's Cathedral, Southwark). M3 J8 south of Basingstoke A30, between Newcott and Rawridge A303 was previously used for the road from County Hall, London to Wandsworth, which was renumbered to the new A3036 so that the number could be used on the current route which replaced the old A3036, the original A3079, and parts of other roads. Fulham Fulham The western part of the Fulham Road. Originally continued east via what is now the A308 and the A4 to the A4 (now the A315). East Sheen Hanworth The road used to continue west of the A312 to the A308 in Sunbury via what is now the A316. Hammersmith Roehampton Hammersmith Bridge closed to motor traffic from April 2019 Kew Cobham The section between Kingston upon Thames and Cobham follows the course of the old A3, and is still mostly called Portsmouth Road. Brompton Maidenhead Exists in three sections, one from Brompton to Chelsea, the second from Chelsea to north of Putney Bridge, and the third from the Robin Hood junction at Kingston Vale to Maidenhead. The section from the A4 to the A3220 was originally part of the A304, and the section from the A3220 to A219 was originally part of the A3217. The section between Roehampton and Kingston upon Thames follows the course of the old A3. Twickenham Hook, LondonRuns in two sections, one in Twickenham and Teddington as a non primary road and a longer primary section from Hampton Court to Hook. Hampton Wick Brentford Runs from the Hampton Wick junction with the A308 at Kingston Bridge northwards via Teddington, Strawberry Hill, Twickenham and Isleworth to the junction with the A315 at Brentford. Hampton Twickenham Also a road connecting Park Road and North Camp station roundabouts. Hampton Harrow The road has been dubbed "The A three-one-queue" owing to frequent peak-hours' heavy congestion. Part of its course ran from Hatton to Harlington, London across where Heathrow Airport is instead of its present course past Cranford more directly to north-east Hayes and districts further north including Harrow. Its middle section is officially known as The ParkwaySee :File:OS_Heathrow_5th_Edition.jpg The deleted section is now Faggs Road, Hatton Road (sections were lost under the airport), A437, Station Road, Coldharbour Lane, and Yeading Lane. Hampton Hill Teddington Hanworth Hounslow Continued beyond A312 to A316 before 2019, this section is now the B391 Knightsbridge East Bedfont Exists in two parts: one from Knightsbridge to the junction with the A4, North and South Circular Roads at Chiswick Roundabout, and the other from the north end of Kew Bridge to East Bedfont. The section in between is part of the South Circular Road Chiswick Start of M3 motorway (Sunbury-on-Thames) Hersham Chertsey Chertsey Byfleet Lightwater Chertsey Guildford Staines upon Thames Henley York Town near Camberley The road used to continue south of the A30 to the A323 in Ash via what is now the B3411. Before that, the road went southeast from Frimley Green via the following renumbered roads: B3012 (to Pirbright), A324 (through Pirbright), B3012 (to Fox Corner), and A322 (to Guildford). Bracknell Guildford Hartley Wintney Guildford Woking Normandy Originally, the road continued west concurrent with the A323 and then southwest via the current B3208. Bagshot Greatham Totton Fawley A326 was previously used for the road from Farnham to Petersfield (now part of the A325, with the southern portion now Petersfield Road, Farnham Road, B3006, and Farnham Road (the A3 was built over one section)) Reading Farnborough Old Windsor Englefield Green Wentworth, Virginia Water Thame Maidenhead Sunningdale Camberley Runfold Originally ran from Windsor to Ditton Park. Construction of the M4 in the 1960s meant the end of the road for the A331, and the M4 was built on top of it at Ditton Park with a parallel access road and the road into Windsor becoming the B470. The northernmost section was declassified altogether and is now Ditton Road. Bagshot Slough Hazel Grove (A3 Junction) near Grayshott Hindhead Renumbered when the Hindhead Tunnel opened in July 2011 having been formerly part of the A3. A333 was previously used for the road from Winchester to Cosham until 1994 when it was downgraded to B3335, B3354, and B2177. Wickham Southampton Southampton Near Eastleigh This was intended to be the route for the M272. Formerly had a branch from the A335/B3335 junction to Twyford. This branch is now the B3335. Cadnam Totton Near Cadnam Christchurch Bournemouth Besselsleigh Originally went via what is now the B3087 and A345 from Burbage to Salisbury; this was changed during a road renumbering in the area. Alton Newbury Basingstoke Pangbourne Merley, (Poole) Redhill Roundabout, Redhill, Bournemouth A341 was previously used for the road from Winchester to Lopcombe Corner. The section west of Stockbridge became part of the A30 which was rerouted, while the remaining section became part of the A272 (now B3049) at the same time that the current A341 was created. Chippenham Andover Previously continued southeast to Winchester; this section was changed to the new A303 (now the B3402), an extension of the A3057 and the new B3420 (southern portion now part of the A272) as part of a renumbering due to the creation of the current A303. Newbury Lopcombe Corner, Winterslow Unused First used from Weyhill to Heytesbury. The section east of Stonehenge became part of the new A303 in 1934. The section just west of Stonehenge became a portion of the A360 by 1956, while the remainder was downgraded to the B390 in the 1970s.

Next used from the A303 at Stonehenge to the A360 at Airman's Corner. On 24 June 2013, the section from Stonehenge Bottom and Stonehenge was closed and grassed over. The remainder was downgraded to Class III as the C506. Marlborough Salisbury Formerly continued north via the current A346, A419, A4259, B4006, A4259, and B4311 to Swindon. Originally, the A345 went southeast from Marlborough via the current A346 to Ludgershall; this was changed in a road renumbering in the area. Ludgershall M4 J15 southeast of Swindon Follows A338 between Collingbourne Ducis and Burbage, then continues via Marlborough. A346 was previously used for the road from Collingbourne Ducis to the A303 south of Shipton Bellinger; this became part of the rerouted A338 in a road renumbering in the area, while the A346 number was reused on the old route of the A345. Ferndown Bournemouth Trickett's Cross Poole A31 in Wimborne Poole Poole M4 J17 north of Chippenham Lytchett Minster bypass Swanage via Corfe Castle Wareham bypass Sherborne Weymouth Warmwell Original route in Weymouth was downgraded to B3155 when A354 was rerouted away from Upwey. Salisbury Isle of Portland Previously ran through town centres of Dorchester and Weymouth. Rerouted in Upwey along new alignment. Amersham Windsor Originally ran from Sherborne to Durweston (near Blandford Forum). The route was chopped up and renumbered in the 1935 renumbering: the section from Sherborne to West Hill (near North Wooton) was absorbed by an extended A352 and the eastern end from Lyndlich to Durweston was handed over to the A357. The remaining seven mile section was deemed unworthy of a three-digit number, so it became the new A3030. Bower Hinton Grimstone A371, near Wincanton Blandford Forum Williton east of Colyford Route passes through Taunton and Chard in Somerset. Between Taunton and Ilminster, it provides the main link between the A303 and the M5. Route previously went southeast from Ilminster via what is now the A303 and the A3088 to Yeovil; the route was changed south of Ilminster to the current routing as part of a renumbering due to the creation of the current A303. Yeovil Nunney Devizes Salisbury Ilfracombe Kilsby The section between Beckhampton and the A4289 in Swindon was renumbered the A4361 to discourage through traffic, and the section through Swindon is now A4289, Wood Street, B4289, Shrivenham Road, Stratton Road, and B4006. Through traffic should use the A4, A346, and A419 between Beckhampton and Swindon. At 195 miles (314 km) is the longest 3 digit A road in the UK. Before the North Devon link road opened, it went along unclassified roads to South Molton, and then northeast via what is now the B3227. Warminster Farrington Gurney Bathford Yarnbrook Via Bradford-on-Avon and Trowbridge. Previously continued south to Warminster; this section became part of the A350. Unused Ran between Yarnbrook and Chippenham in Wiltshire. Became a portion of an extended A350 in 1935.