404:
421:
553:. The upgrades took place mostly for more reliable journeys to Gatwick Airport and increase the overall capacity of the route. The upgrades include an all-lane-running motorway, 12 new emergency areas, a new concrete central barrier replacing the current steel one, new roadside sound barriers, variable speed limits and two new emergency access slip roads. Changes were also implemented on the M23 junction 9 spur, with the hard shoulder west bound converted to a running lane, and static 50 mph (80 km/h) speed limits implemented in both directions.
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900:
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506:, who announced they would not be building that Ringway, which meant that had the M23 continued north into inner London it would not have had the motorway required at its northern end to distribute traffic to the east and west. The M23 plan was gradually scaled back further to omit the section across
525:
The missing section of motorway and the missing six junctions north of Hooley were not constructed due to the refusal of the GLC to finance the project, having encountered large scale opposition to the construction of
Ringways elsewhere in London. However, the scale of the four-tier junction between
378:
in towards
Central London has resulted in the A23 carrying the majority of traffic through South London to the motorway. This is largely a single carriageway route, with many level junctions, traffic lights and awkward interchanges. It travels largely through residential areas and is inadequate for
556:
In
January 2020 all smart motorway projects were put under review due to concerns about their safety, during this period no new smart motorways could open. The review was published on 12 March 2020 and required no immediate amendments to the design or construction, however new technology to detect
564:
The fourth lane was opened to traffic on 2 April 2020, however with a temporary 50 mph speed limit. Works were scheduled to take place until July 2020 to finish installation of equipment, followed by testing and commissioning, before the project is completed and can run at the
501:
By 1972 the southern section of
Ringway 2 had been dropped from the plan, with an alternative proposal that the M23 continue further into London to end on Ringway 1. This was immediately countered in the same year by the
494:. This was dropped in 1967 when the northern terminus was changed to Ringway 2. While a definite route had not been chosen at that time for the northern section, approval was met for the route south of the
363:(M25 junctions 6 to 8). The current northern terminus at junction 7 uses the original sliproads to meet the A23 and a flyover above the junction built for the onward northern continuation remains unused.
1238:
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are used to provide distance and carriageway identifier information. Where a junction spans several hundred metres (yards) and start and end points are available, both are cited.
2637:
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390:. It was financed as part of the development of Maidenbower by the construction consortium. It has only a northbound slip road, no southbound access.
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where it rejoins the A23. The northern end of the motorway starts on what is effectively a 2-mile (3.2 km) spur north of junction 7 of the
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514:) before the plan was postponed indefinitely. By the late 1970s, the area along the proposed line of the motorway had become affected by
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518:, and while the proposals were finally dropped in the mid-1980s, much of the land reserved for the route was not released by the
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In an earlier version of the
Ringways Plan it would have continued into central London where it would have met the
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The motorway was constructed between 1972 and 1975, at the same time as the southern section of the M25 from
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The rivalry between
Brighton & Hove Albion and Crystal Palace football clubs is often referred to as
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Between July 2018 and July 2020 works took place to upgrade the M23 between junctions 8 and 10 to an
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2188:
2122:
1981:
1933:
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17:
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1976:
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211:
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static vehicles is required to be fitted within three years, and a review on spacing of
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1649:"Five things you may not know about the M23 derby between Brighton and Crystal Palace"
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A new junction (J10a) was opened in 1997, between J10 and J11, for access to the new
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2019:
2014:
2009:
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in the UK, is indicative of the importance attached to the M23 at that time.
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1672:"Brighton and Crystal Palace fans furious at Sky Sports over derby comments"
511:
476:
464:
448:
339:(junction 8 on the M23). From Hooley it runs for 17 miles (27 km) past
1315:"The M23 Motorway (Balcombe Road Interchange) Connecting Roads Scheme 1996"
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1524:"A Highways England road project | M23 junctions 8 to 10: smart motorway"
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615:
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320:
304:
219:
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3010:
2840:
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2714:
2057:
1918:
1501:
1470:
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1376:
1344:
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907:
894:
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829:
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491:
383:
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328:
215:
207:
135:
1734:
747:
610:
410:
316:
312:
203:
185:
122:
537:
365:
2949:
1607:– Locations extracted from Traffic Camera Popup identifier text
1549:"Smart Motorway All Lane Running Overarching Safety Report 2019"
510:
and end the motorway at an unsuitable location on
Croydon Road (
2686:
1755:
347:
and
Crawley. A spur runs from junction 9 to Gatwick Airport.
918:
1.000 mi = 1.609 km; 1.000 km = 0.621 mi
463:
in south London and was originally intended to terminate in
374:
The cancellation of the unbuilt northern section from the
1719:
858:
No exit from M23 Northbound, no access to M23 Southbound
1729:
1707:
1702:
1528:
Highways
England Improvements and major road projects
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195:
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166:
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128:
118:
113:
103:
95:
87:
74:
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1038:Merstham Interchange – Intersection of M25 and M23
443:The M23 was planned to relieve congestion on the
2698:
1767:
8:
1571:"New moves in M23 'smart motorway' upgrade"
2705:
2691:
2683:
1800:
1774:
1760:
1752:
1595:Traffic England Live Traffic Condition Map
583:
260:
57:
1724:
1425:
1423:
1421:
1419:
1244:The M23 is the only motorway in Sussex.
1253:
945:
526:the M23 and the M25, one of only three
1628:M23 Smart Motorway Progress March 2020
31:
467:at a junction with the controversial
7:
2665:
1670:Mills, Richard (22 February 2021).
488:Ringway 1 (the London Motorway Box)
1721:Template:Attached KML/M23 motorway
913:Road continues as A23 to Brighton
27:Road in Surrey and Sussex, England
25:
1466:"Greater London Development Plan"
783:Terminus of spur towards Gatwick
647:Road continues as A23 to Croydon
475:(the intended replacement of the
379:the level of traffic it carries.
2664:
2653:
2652:
2381:
2380:
2219:
1782:
1372:"M23 Northern terminals Inquiry"
898:
881:
820:
806:
765:
712:
633:
419:
402:
281:
266:
139:
134:
91:15.9 mi (25.6 km)
36:
1789:Motorways in the United Kingdom
1740:History of the aborted M23 plan
1502:Parliamentary Debates (Hansard)
1471:Parliamentary Debates (Hansard)
1440:Parliamentary Debates (Hansard)
1377:Parliamentary Debates (Hansard)
1345:Parliamentary Debates (Hansard)
1267:Parliamentary Debates (Hansard)
857:
851:
848:
63:Shown with UK motorway network
1:
2601:South Wales Trunk Road Agent
311:, running from the south of
18:M23 motorway (Great Britain)
319:, where it splits from the
239:Roads in the United Kingdom
3865:
2713:Strategic road network in
1747:The Motorway Archive – M23
477:South Circular Road (A205)
2648:
2217:
2197:
2159:
2131:
2048:
1990:
1942:
1904:
1856:
1803:
1290:"1:50 000 Landranger map"
917:
787:
741:
614:
609:
604:
601:
598:
595:
592:
589:
586:
551:all-lane-running motorway
409:Unfinished junction 7 at
370:Junction 9, looking north
259:
234:
225:
162:
79:
46:
1600:10 February 2012 at the
1262:"Construction Contracts"
924:
520:Department for Transport
1735:Motorway Database – M23
1171:Junction 10a of the M23
561:was to be carried out.
429:at Junction 8 with the
50:M23 highlighted in blue
2412:Charing Cross, Glasgow
1218:Junction 11 of the M23
1124:Junction 10 of the M23
877:Pease Pottage services
559:emergency refuge areas
546:
371:
2633:Motorway service area
1077:Junction 9 of the M23
982:Junction 7 of the M23
699:Junction 8 of the M23
579:driver location signs
541:
522:until the mid-1990s.
369:
66:Show UK motorways map
3849:Transport in Crawley
3844:Roads in West Sussex
3834:Motorways in England
1725:KML is from Wikidata
1575:midsussextimes.co.uk
1464:(19 February 1973).
1433:(12 November 1974).
1207:51.08638°N 0.19690°W
1160:51.10449°N 0.14402°W
1113:51.13272°N 0.14128°W
1066:51.15922°N 0.13441°W
1018:51.49472°N 0.49556°W
971:51.28053°N 0.15507°W
688:51.26417°N 0.12789°W
665:Merstham Interchange
567:national speed limit
498:boundary at Hooley.
53:Show interactive map
1497:"Motorway (London)"
1370:(9 December 1969).
1202: /
1155: /
1108: /
1061: /
1013: /
966: /
683: /
130:Major intersections
2613:Transport Scotland
2442:Spaghetti Junction
1348:. 23 February 1987
1319:legislation.gov.uk
1233:In popular culture
1212:51.08638; -0.19690
1165:51.10449; -0.14402
1118:51.13272; -0.14128
1071:51.15922; -0.13441
1023:51.49472; -0.49556
976:51.28053; -0.15507
693:51.26417; -0.12789
547:
528:stack interchanges
372:
252:A and B road zones
3821:
3820:
2680:
2679:
2589:National Highways
2215:
2214:
1029:Junction 8 of M23
938:
937:
929:Incomplete access
730:Dartford Crossing
427:Stack interchange
386:neighbourhood of
297:
296:
293:
292:
82:National Highways
75:Route information
16:(Redirected from
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2707:
2700:
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2684:
2672:
2668:
2667:
2660:
2656:
2655:
2606:Traffic officers
2594:Traffic officers
2582:Related articles
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2384:
2383:
2229:Northern Ireland
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1651:. 8 January 2018
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1495:(26 July 1978).
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394:Unbuilt sections
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3839:Roads in Surrey
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3267:(West Midlands)
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2623:Preston By-pass
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2538:Prince of Wales
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1622:Wayback Machine
1615:
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1605:Highways Agency
1602:Wayback Machine
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1493:William Shelton
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1431:William Shelton
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1294:Ordnance Survey
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941:Coordinate list
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1694:External links
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1462:Geoffrey Ripon
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496:Greater London
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1679:. Retrieved
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1655:27 September
1653:. Retrieved
1643:
1632:, retrieved
1627:
1618:Ghostarchive
1616:Archived at
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1403:Roads.org.uk
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337:M25 motorway
300:
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230:Road network
199:destinations
147:M25 motorway
107:Opened: 1974
99:1974–present
29:
2954:(M25 links)
2563:Queensferry
2432:Lydiate Ash
2422:Handy Cross
2397:Almondsbury
1681:22 February
1508:18 December
1477:18 December
1446:18 December
1383:18 December
1368:Fred Mulley
1352:18 December
1299:18 December
1274:18 December
1210: /
1163: /
1116: /
1069: /
1021: /
974: /
743:West Sussex
691: /
484:Balham Loop
388:Maidenbower
333:West Sussex
327:, south of
190:West Sussex
3828:Categories
3805:Toll roads
3712:Other DBFO
3384:North West
2723:South West
2533:Scammonden
2518:to Nowhere
2427:Longbridge
1676:sussexlive
1248:References
1216: (
1194:51°05′11″N
1169: (
1147:51°06′16″N
1122: (
1100:51°07′58″N
1075: (
1053:51°09′33″N
1027: (
1005:51°29′41″N
980: (
958:51°16′50″N
697: (
675:51°15′51″N
577:Data from
486:spur from
2618:DfI Roads
2483:Avonmouth
2462:Thurcroft
2407:Catthorpe
2377:Junctions
1197:0°11′49″W
1150:0°08′38″W
1103:0°08′29″W
1056:0°08′04″W
1008:0°29′44″W
961:0°09′18″W
906: -
889: -
828: -
814: -
773: -
720: -
678:0°07′40″W
641: -
599:Junction
590:Location
573:Junctions
473:Ringway 2
449:Streatham
247:Motorways
2659:Category
2553:Thelwall
2528:Rakewood
2508:Kingston
2503:Gathurst
2498:Friarton
2488:Bromford
2387:Category
2327:A6144(M)
1848:A1077(M)
1703:KML file
1634:12 April
1620:and the
1598:Archived
1580:12 April
1555:12 April
1551:. gov.uk
1533:12 April
1408:12 April
1324:12 April
891:Brighton
722:Heathrow
616:Merstham
461:Coulsdon
447:through
435:Merstham
357:Godstone
305:motorway
220:Brighton
182:Counties
167:Location
3813:M6 Toll
3677:A194(M)
3657:Area 14
3547:Area 12
3462:A627(M)
2836:A404(M)
2831:A308(M)
2799:(South)
2715:England
2671:Commons
2558:Tinsley
2471:Bridges
2452:Thorney
2402:Broxden
2336:Unbuilt
2322:A601(M)
2317:A102(M)
2189:A823(M)
2123:A627(M)
2058:M6 Toll
1982:A404(M)
1934:A329(M)
1929:A308(M)
1843:A194(M)
1838:A167(M)
908:Horsham
895:Crawley
854:Crawley
830:Crawley
789:Crawley
779:Redhill
775:Gatwick
734:Reigate
726:Watford
643:Croydon
587:County
492:Tooting
471:Plan's
384:Crawley
361:Reigate
351:History
341:Redhill
329:Crawley
307:in the
216:Crawley
208:Croydon
197:Primary
172:Country
104:History
96:Existed
3672:A66(M)
3457:A74(M)
3264:Area 9
3159:Area 7
2946:Area 5
2876:Area 4
2796:Area 3
2573:Weaver
2548:Thames
2543:Severn
2513:Medway
2457:Thorpe
2312:A41(M)
2307:A40(M)
2302:A18(M)
2275:Former
2151:A74(M)
2118:A66(M)
2113:A64(M)
2040:A58(M)
2035:A57(M)
1977:A48(M)
1924:A38(M)
748:Horley
611:Surrey
605:Notes
516:blight
457:Purley
411:Hooley
317:Surrey
313:Hooley
204:London
186:Surrey
123:Hooley
88:Length
3795:A1053
3735:A1(M)
3667:A1(M)
3647:A1033
3592:A1(M)
3537:A5117
3532:A5103
3527:A5036
3374:A5148
3369:A4510
3254:A5111
3149:A1307
3089:A1(M)
3061:A3113
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2996:A1(M)
2936:A2070
2826:A3(M)
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2184:A8(M)
1919:A3(M)
1833:A1(M)
870:53.8
865:33.4
846:49.2
841:30.6
826:A2011
800:46.1
795:28.6
759:43.1
754:26.8
659:31.0
654:19.3
627:28.2
622:17.5
433:near
323:, to
303:is a
145:J8 →
3790:A419
3785:A417
3780:A249
3775:A174
3770:A168
3702:A696
3697:A184
3642:A628
3637:A616
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3587:M621
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3522:A663
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3512:A590
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3249:A516
3244:A453
3144:A428
3139:A421
3134:A414
3129:A141
3124:A120
3071:East
3051:A405
3046:A316
3041:A282
2950:DBFO
2931:A259
2866:A404
2861:A303
2821:M271
2786:A303
2638:List
2523:Ouse
2179:M898
2174:M876
2108:M621
2103:M606
2098:M602
1896:M275
1891:M271
1828:M181
1823:M180
1712:help
1708:edit
1683:2021
1657:2018
1636:2020
1582:2020
1557:2020
1535:2020
1510:2012
1479:2012
1448:2012
1410:2020
1385:2012
1354:2012
1326:2020
1301:2012
1276:2012
904:A264
868:53.3
863:33.1
849:10a
844:48.8
839:30.3
812:A264
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793:28.5
757:42.7
752:26.5
657:30.5
652:19.0
625:27.4
620:17.0
512:A232
459:and
299:The
3765:A69
3760:A50
3755:A35
3750:A30
3745:A19
3730:M62
3725:M40
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2776:A40
2771:A38
2766:A36
2761:A30
2751:M49
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2741:M32
2568:Usk
2493:Don
2363:M64
2358:M31
2353:M16
2348:M15
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2297:M85
2292:M63
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2207:M90
2169:M80
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2030:M58
2025:M57
2020:M56
2015:M55
2010:M54
2005:M53
2000:M50
1972:M49
1967:M48
1962:M45
1957:M42
1952:M40
1914:M32
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887:A23
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771:A23
718:M25
639:A23
596:km
593:mi
504:GLC
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445:A23
431:M25
376:M25
359:to
331:in
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315:in
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42:M23
3830::
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1710:•
1674:.
1624::
1573:.
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1468:.
1437:.
1418:^
1401:.
1374:.
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