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A405

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A405
A405.png
Cameraicon.png View gallery (16)
North Orbital Road
From:Hunton Bridge (TQ097996)
To:Park Street (TL144050)
Length:4.8 miles (7.7 km)
Meets: A41, A412, M1, M25, A414, A5183
Former Number(s):A412
Old route now:A412, M25, A414
Highway Authorities

Hertfordshire Council

Traditional Counties

Hertfordshire

Route outline (key)
A405 Maple Cross - Hunton Bridge
A405 Hunton Bridge - Waterdale
A405 Waterdale - Park Street
A405 Park Street - Hatfield
This article is about the North Orbital Road, near Watford and St Albans, Hertfordshire.
For the 1922 route, now A406 and A4005, see A405 (Gunnersbury Park - Wembley)
.

Route

A new build 1930s road, the A405 North Orbital road links the Watford bypass and A41 at Hunton Bridge to the A414 south of St Albans.

Hunton Bridge - Park Street

A405 North Orbital Road and Tippendell Lane roundabout

Starting at a roundabout GSJ on the A41 Watford bypass, the A405 heads east then north to bypass Abbots Langley. Although the road is D2 the speed limit is 40mph owing to the large number of side roads and occasional roundabout.

The limit increases to 50 before the A405 reaches the M1 at the parclo J6. Now carrying traffic between central London via the M1 and the M25, the road then passes to the west of Bricket Wood and soon reaches a roundabout at M25 J21A.

On the far side of the motorway - and still D2 - the road bears right at the next roundabout to bypass Chiswell Green and presently reaches the Park Street Roundabout to the south of St Albans where it meets the former A5 (now A5183) and former M10 (now A414). The road ends here.

History

The A405 was originally planned as part of a London orbital.

When originally built in the 1930s the road ran from the A41 in Watford to the A555 (now A1) Barnet bypass, passing to the south of St Albans. By the 1970s the road had been extended west to bypass Rickmansworth and meet the A412 at Maple Cross.

The Rickmansworth bypass was later upgraded and incorporated into the M25 as the section between J17 and the spur at J19 (although the spur at J17 is now the A412). Later still the St Albans bypass was incorporated into a rerouted A414, giving the road its current length.



A405
JunctionsBricket Wood Junction • Chorleywood Interchange • Hunton Bridge • Leavesden Green • London Colney Roundabout • Maple Cross Interchange • Napsbury Lane Junction • Park Street Roundabout • Waterdale Interchange
RoadsT102 (Britain)
Related Pictures
View gallery (16)
Alu Star overhead - Coppermine - 9541.JPGLeavesden Green- A41 North Western Avenue - Geograph - 66236.jpgM25 Motorway Link Road, Chandler's Cross - Geograph - 92339.jpgPark Street motorway upgrade.pngPark Street with M10 A405 merge.png
Other nearby roads
RickmansworthA404 • A412 • A4145 • B4021 (Rickmansworth) • B4504 (Rickmansworth - Watford) • C101 (Hertfordshire) • C103 (Hertfordshire) • C160 (Hertfordshire) • Cublington Airport Motorway • E30 • Hatfield - Reading Turnpike • M25
WatfordA4008 • A41 • A41(M) • A41/Central London - Watford • A41/Watford - Aylesbury • A411 • A412 • A4125 • A4140 • A4145 • A4163 • A4178 • A4251 • A500 (Marble Arch - Finchley) • A5088 (Watford Bypass) • B4504 (Rickmansworth - Watford) • B4539 • B4542 • B460 • B462 • B468 • C102 (Hertfordshire) • C104 (Hertfordshire) • C122 (Hertfordshire) • C123 (Hertfordshire) • C124 (Hertfordshire) • C177 (Hertfordshire) • C74 (Hertfordshire) • C75 (Hertfordshire) • C77 (Hertfordshire) • E13 • E30 • E31 (via Carlisle) • E33 (London - Glasgow) • Hatfield - Reading Turnpike • M1 • M25 • T102 (Britain) • T35 (Britain)
St AlbansA1057 • A1081 • A412 • A414 • A4147 • A5 • A5/Central London - Brockley • A5183 • A6 • Akeman Street • B4630 • B5378 • B6424 • B6426 (St Albans - Water End) • B651 • B691 • C141 (Hertfordshire) • C142 (Hertfordshire) • C143 (Hertfordshire) • C61 (Hertfordshire) • C62 (Hertfordshire) • C78 (Hertfordshire) • C97 (Hertfordshire) • C98 (Hertfordshire) • E31 (via Carlisle) • Hatfield - Reading Turnpike • M10 • Stane Street (East Anglia) • T102 (Britain) • T11 (Britain) • T12 (Britain) • Watling Street
HatfieldA1(M) • A1(M)/South Mimms - Baldock • A1000 • A1001 • A1057 • A414 • A5092 (Barnet Bypass) • A555 (Barnet Bypass) • A6129 • B197 • B555 • B556 • B6426 • C119 (Hertfordshire) • C60 (Hertfordshire) • C91 (Hertfordshire) • E31 (via Newcastle) • Great North Road • Hatfield - Reading Turnpike • M100 • T1 (Britain) • T102 (Britain)
A400-A499
A400 • A401 • A402 • A403 • A404 • A405 • A406 • A407 • A408 • A409 • A410 • A411 • A412 • A413 • A414 • A415 • A416 • A417 • A418 • A419
A420 • A421 • A422 • A423 • A424 • A425 • A426 • A427 • A428 • A429 • A430 • A431 • A432 • A433 • A434 • A435 • A436 • A437 • A438 • A439
A440 • A441 • A442 • A443 • A444 • A445 • A446 • A447 • A448 • A449 • A450 • A451 • A452 • A453 • A454 • A455 • A456 • A457 • A458 • A459
A460 • A461 • A462 • A463 • A464 • A465 • A466 • A467 • A468 • A469 • A470 • A471 • A472 • A473 • A474 • A475 • A476 • A477 • A478 • A479(W) • A479(E)
A480 • A481 • A482 • A483 • A484 • A485 • A486 • A487 • A488 • A489 • A490 • A491 • A492 • A493 • A494 • A495 • A496 • A497 • A498 • A499
Defunct Itineraries & Motorways: A403 • A404(M) • A405 • A407 • A423(M) • A430 • A437 • A446(M) • A455 • A464 • A475 • A491