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A404(M)

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A404(M)
Cameraicon.png View gallery (16)
From:Holyport (SU886786)
To:Burchett's Green (SU856809)
Length:2.3 miles (3.7 km)
Meets: M4, A308(M), A4, A404
Former Number(s):M4, A4(M), A423(M)
Highway Authorities

Highways England

Traditional Counties

Berkshire

Route outline (key)
A404(M) Holyport - Burchett's Green
Junction List
Junc Southbound Northbound
M4 8/9 A308(M), M4 Start of road
9a Cox Green,
White Waltham
Cox Green,
White Waltham
9b Start of road A4
Globe.png
For detailed information about this topic, see CBRD Motorway Database and Pathetic Motorways

Contents

Introduction

Maidenhead Bypass

The A404(M) is part of the former A4(M) and M4 Maidenhead bypass, and is one of two motorways to meet the M4 at the double numbered J8/9.

The junctions along it are numbered 9A and 9B, fitting in with the M4's junction numbering scheme.

Route

The road begins at Holyport Interchange: a large square-shaped signalised roundabout with slip roads to the M4, whose mainline passes underneath the roundabout, and the A308(M), also coming off the roundabout.

A short distance later, the A404(M) curves onto the historic A4(M)/M4 Maidenhead bypass line (whose route is still visible from the air) and, almost immediately, there is a tight junction with unclassified roads to Cox Green and White Waltham. The slip roads are so tight that they have 30mph advisory speed limits signed on the mainline and the fork sign is a 'Mr Floppy'.

Continuing around Maidenhead, the motorway ends at The Thicket Roundabout, passing underneath and becoming the all-purpose (and still trunk) A404. The underpass at The Thicket is the newest bit of the motorway, built as part of the A404 dual carriageway route in the early nineties. Previously the motorway ended at a smaller roundabout on the A4, with the A423 heading straight on.

History

Much of the A404(M) began life as the A4(M) Maidenhead bypass, which late became part of the M4, as originally the plans were for a route north of Reading.

After the M4 south of Reading opened, the leftover bit of motorway was diverted to a new junction at Holyport. As the A423 ended at the other end of the motorway, this section of motorway was numbered A423(M).

In the early 1990s, a new north-south link, linking the Marlow and Maidenhead bypasses, was created by dualling parts of the A404 and A423 and grade-separating Burchetts Green Roundabout and The Thicket Roundabout. This, coupled with the loss of the A423's importance due to the M40 being finished prompted a large scale renumbering of the A423 south of Banbury, with the A423(M) becoming A404(M) and creating a one-number high-quality route between the M4 and the M40 at High Wycombe.

Opening Dates

For detailed information about this section, see CBRD Motorway Database: A404(M) Timeline

Links

CBRD

Roads UK

Pathetic Motorways



A404(M)
JunctionsCox Green Interchange • Holyport Interchange • The Thicket Roundabout
ServicesMaidenhead services
MiscellaneousA404/Named Junctions
Related Pictures
View gallery (16)
A404(M) J9a sign.jpgA404(M) Maidenhead - Coppermine - 6879.JPGA404(M) Maidenhead - Coppermine - 6880.JPGA404(M) Maidenhead - Coppermine - 6881.JPGA404(M) Maidenhead - Coppermine - 6882.JPG
Other nearby roads
MaidenheadA3034 (Maidenhead) • A3064 (Maidenhead) • A308 • A308(M) • A3095 • A4 • A4(M) • A4/Reading - Slough • A404 • A4094 • A4130 • A415 • A416 • A423 • A423(M) • B3023 (Maidenhead) • B3028 • B4447 • E105 (London - Fishguard) • E30 • EuroVelo 2 • Longest Lane • M4 • NCN4 • T42 (Britain) • T9 (Britain)
Motorways in Great Britain
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A1(M) • A3(M) • A8(M) • A14(M) • A38(M) • A48(M) • A57(M) • A58(M) • A64(M) • A66(M) • A74(M) • A92(M) • A167(M) • A168(M) • A194(M) • A195(M) • A308(M) • A329(M) • A404(M) • A601(M) • A627(M) • A635(M) • A666(M) • A823(M) • A1058(M)
Motorway Spurs • (M4 Heathrow Spur • M25 T5 Spur • Walton Summit M'way)
Former MotorwaysM10 • M15 • M16 • M30 • M41 • M52 • M62 • M63 • M64 • M65 • M68 • M85 • M110 • M111 • M270 • M274 • M531 • M600
A2(M) • A4(M) • A5(M) • A8(M) • A11(M) • A18(M) • A20(M) • A21(M) • A23(M) • A36(M) • A40(M) (Central London) • A40(M) (Buckinghamshire) • A41(M) • A46(M) • A48(M) (Morriston) • A48(M) (Port Talbot) • A65(M) • A102(M) (North) • A102(M) (South) • A423(M) • A446(M) • A604(M) • A638(M) • A696(M) • A1231(M) • A6127(M) • A6138(M) • A6144(M)
Unbuilt MotorwaysM4 Toll • M12 (Woodford - Brentford) • M12 (Woodford - Maplin) • M12 (Brentwood - -Chelmsford) • M13 • M17 • M19 • M31 • M58 • M59 • M60 • M62 RR • M64 • M81 • M82 • M83 • M100 • M272 • M601 • M650
A2(M) • A6(M) (West) • A6(M) (East) • A48(M) • A59(M) • A61(M) • A556(M) • A695(M)
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