A1(M) South Mimms to Letchworth

The archive includes the motorway from Junction 1 with the M25 in South Mimms to Junction 10 north of Baldock, length 23 miles and the length of 14 miles between Alconbury and Peterborough from Junction 14 to Junction 17.

Why has the A1 Great North Road not been improved to motorway status over its full length of some 400 miles, when it is a major north-south artery between London and Edinburgh? This appears perplexing, particularly as a scheme for a national motorway system submitted by the Institution of Highway Engineers to the Ministry of Transport in 1936 included a motorway between the north side of the London Orbital Motorway to the north of Hull as well as a motorway from the northwest side of the London Orbital Motorway to Leeds and Newcastle-upon-Tyne. The answer could be said to be 'expediency'. The Minister of War Transport, the Rt. Hon. Alfred Barnes, announced in the House of Commons in 1946 the Government's proposals for a network of principal national roads incorporating 800 miles of motor roads and improvements of existing roads incorporating by-passes of urban areas, but generally with improvement in their present alignment. The A1 was shown in the latter category. This had the advantage that relief from traffic congestion by the construction of by-passes and improvements could be started without recourse to new legislation required for restriction of categories of vehicles and access on motorways. However, the policy of by-passes and on-line improvements had the disadvantage that smaller communities which were not considered to merit a by-pass still had to endure the heavy traffic on this important artery.

In May 1956, Rt Hon. Harold Watkinson, Minister of Transport and Civil Aviation, pronounced that the Government intended to transform the A1 into a major north-south road link designed to cope with modern traffic conditions. The preparation of schemes for the provision of dual carriageways to replace the existing narrow and winding single carriageway lengths of the A1 was allocated to County Councils as Agents to the Ministry.

In Huntingdonshire, for example, the programme consisted of the provision of a dual carriageway for 28 miles of the A1 Great North Road from Eaton Socon, west of St Neots, to the River Nene at Wansford, north-west of Peterborough. The earliest length to be completed was the 5½ miles from Alconbury Hill, north-west of Huntingdon to the B660 road, near Conington. It was opened to traffic in 1957 and incorporated a unique constructional experiment by the County Council in conjunction with the Roads Research Laboratory of the Department Scientific and Industrial Research. This extended over 2½ miles of the northbound carriageway and has provided most useful basic data on the performance under traffic of a wide range of thicknesses and strengths of the layers of rigid and flexible road pavements.

Stilton Bypass, south of Peterborough, opened to traffic by Rt Hon Harold Watkinson on the 21st July 1958, was the first bypass to be completed on the A1 subsequent to the Minister's pronouncement. This section of the ancient Roman Road, Ermine Street, and later post-road between London, York and Scotland, has the added distinction of being part of the route on which the first Turnpike Road Act of 1663 applied, with Stilton one of the first three locations authorised for the collection of tolls in the Act.

The earliest length of the A1 to be opened as a motorway, following the procedure laid down in the Special Roads Act 1949, was Stevenage Bypass in May 1962. Its length is 7 miles, with Hertfordshire County Council as Agent Authority, Main Contractor Martin Cowley with a tender price of £1.8 million. This was followed by Baldock Bypass in July 1967, also 7 miles long, with Herts C C as Agent Authority, Main Contractor A Monk with a tender price of £3.5 million.

In 1959, the Government decided that improvement of the A1 between South Mimms and Welwyn should be examined as a whole and in 1962 the Minister of Transport announced that this would form a continuous motorway. The A1 (M) Lemsford - Welwyn length of 3 miles was opened in May 1973 under the aegis of the Eastern Road Construction Unit (Herts Sub-Unit), Main Contractor A F Budge, tender price £2,2 million. The length of 3 miles between South Mimms and Roestock, south of Hatfield, was opened in May 1979, also under the aegis of ERCU (Herts SU), Main Contractor Higgs and Hill, tender price £3.6 million.

Roestock to Stanborough

This left the length of 3 miles of the A1 between Roestock and Stanborough.  This section of Al is part of the original Barnet By-Pass which was built in 1925-27 and the length between Roehyde (A405) and Oldings (A414) carries traffic from the North Orbital Road in addition to long distance north - south and local traffic.

After the publication in July 1972 of the Urban Motorways Committee report "New Roads in Towns" the proposals were reviewed. That review led to three "on-line" and two western bypass alternatives being identified as possible improvements between Roestock and Stanborough.  The public were consulted in 1974 to obtain their opinion of these alternatives and also to invite comment on the need for improvement and to elicit any other proposals. The scheme was one of the "on-line" alternatives and it was selected as the Department of Transport's preferred scheme in 1977.  It was the subject of a Public Inquiry in 1981 at which the details of the project and its effects were described, and objections to the scheme were presented, some of which resulted in amendments being made to the scheme as presented. The revised scheme is that which was built.

What was described as the "Hatfield Project" was an overall concept - Road and Redevelopment.  The aim was to create an acceptable solution to a difficult problem, which would overcome the conflicting demands of highway, environment and local needs. The overall concept had been to create a scheme which offered the opportunity to revitalise and replace the infra-structure of the District at the same time as solving the very obvious traffic problem in this largely urban environment.  Hence, a partnership involving both the public and private sectors, was brought together to bring to fruition a suitable scheme.  The final link in achieving this overall Concept was therefore the selection by the District Council of a development partner.

The Department of Transport, the Hertfordshire County Council and the Welwyn Hatfield District Council worked closely together during the project conception. The chosen scheme included, on environmental grounds, a 1150 metre long tunnel and in so doing created a redevelopment area of some 25 acres of land on the western side of Hatfield only ½ mile from the town centre.  Work started In the spring of 1983.  At Hatfield this initially involved alterations to gas, electricity and water mains, sewers and telephone equipment, and demolition of buildings. These was necessary to enable road construction to proceed unhindered.

On April 2nd 1984 Tarmac National Construction (now Carrilion Construction) started road construction work under contract to the Department of Transport. This work was supervised by Hertfordshire County Council.  On October 26th 1984 W.H. Smith and Company Electrical Engineers Ltd were appointed to supply the electrical and mechanical services for the tunnel, the work being supervised by Mott Hay and Anderson Electrical and Mechanical Services.

The advance Works included numerous public utilities' services which followed the route of the existing A1 through Hatfield which is close to the new motorway and crosses it twice.  Large scale alterations were necessary to the public utilities' apparatus to enable the new road to be constructed. As far as possible these alterations were carried out in advance of the road construction.  The alterations to the public services were co-ordinated by Hertfordshire County Council and were carried out by the various service authorities, British Gas, Eastern Electricity, Lee Valley Water Co., Welwyn Hatfield District Council (its sewerage agent to Thames Water Authority) and British Telecom.

The built-up area on the line of the motorway, between Cavendish Way and Birchwood was demolished by Kimbell Construction Ltd in advance of the road construction. This was done to avoid the potential disruption to construction work due to unforeseeable difficulties in the demolition of a large built-up area.  The contract also included the erection of a temporary noise barrier along the eastern boundary of the demolition area. This barrier remained during the road construction period to screen the adjacent houses from the construction work and was removed after construction of the motorway was completed.

The motorway is entirely at or below ground level. The major cutting is from south of Cavendish Way to Birchwood, and this cutting is the site of the tunnel and its approaches. The motorway is also in cutting where it passes under Roehyde interchange.  The interchanges are on embankments above motorway level.  

Excavation totalled 900,000 cubic metres of which 390,000 cubic metres were placed in embankments and a further 80,000 cubic metres used as filling for landscaping and other environmental improvements, including the construction of noise mounds to protect adjacent properties from the effects of the completed motorway.

In addition to the disposal of water which falls upon the road surfaces, the drainage scheme involved the lowering of the ground water level at the site of the tunnel.  The permanent ground water drainage system consisted of a grid of filter drains below the motorway which discharged to a pump chamber behind the cast abutment of the tunnel at the Southern Sub-Station. A separate drainage system to collect water from the motorway surface in the tunnel also discharged into that pump chamber.

Water from the motorway cutting at Roehyde was also collected in a pump chamber situated within the interchange roundabout on the west side of the motorway.  Water from the tunnel pump chamber is pumped to the Roehyde pump chamber. From there, together with the water from the adjacent motorway, it is pumped to an outfall into the Ellenbrook.  In fact, all water from the motorway and all-purpose roads between Roestock and the north end of the tunnel discharges into the Ellenbrook. However, discharge to the brook had to be limited to not more than 75 litres per second. To achieve this all water first passed into a balancing pond, either via the pumps at Roehyde or directly from gravity drains.   The capacity of the balancing pond is 1,200 cubic metres and the outfall from the pond is designed to pass a flow of 75 litres per second when the pond is full.

Water from the northern approach to the tunnel collects in a pump chamber adjacent to the north portal of the tunnel; discharge from the pumps is piped some 1,600 metres to an outfall into the River Lea. The motorway and all-purpose roads at the northern end of the scheme discharge by gravity to the River Lea.  To prevent pollution of the water courses by oil or other chemicals which might be spilled on the highway, Ellenbrook is protected by the balancing pond which is designed to act as an oil trap. It also has a penstock by which the outfall can be closed if pollutants which are miscible with water should be spilled on the highway.  The River Lea is protected by an oil trap which also has a penstock to close the outfall.

The 1150m long Hatfield Tunnel is a cut-and-cover structure constructed east of the existing A1 between Cavendish Way and the Green Lanes Roundabout. The tunnel accommodates the full motorway formation width with a continuous separating wall along the motorway centre line. Raised walkways along both sides of each carriageway accommodate the extensive cabling and service ducts required for tunnel services and motorway communications.

The construction of the tunnel is of traditional reinforced concrete, the roof, walls and foundation bases being continuous to form a two bay portal. The tunnel is founded on the glacial gravels with spread footings, but where additional heavy loads from the development structures affect the central wall its foundations are strengthened locally by insitu bored piles founding in the hard chalk sub strata.  It is estimated that nearly 10,000 tonnes of reinforcement and over 80,000 cubic metres of concrete were used to construct the tunnel.

Tunnel Services include power supplies, lighting, ventilation, environmental control, plant monitoring, pumping, communications, fire fighting, security and traffic surveillance. Automatic control systems will continuously monitor and report to central control and maintenance on the operational state of the plant and information transmitted and were stored on a computer.

The tunnel is longitudinally ventilated by 52 jet fans in each bore, located above the walkways at roof level and automatically controlled.  Panels at 39m intervals on the nearside walkway, provide emergency telephone facilities connected to police control, and automatic fire hose reels. Radio aerials for emergency and maintenance services are mounted in the tunnel roof.  Closed Circuit television System is provided in each bore of the tunnel and is remotely controlled from Police Control at Hertfordshire County Police HQ at Stanborough.

Sensor loop systems in the carriageway surface at intervals throughout the motorway detect vehicle movements. The data obtained is used to provide the police control room with information of traffic flow patterns and potential problems.

Apart from the tunnel, there are 12 other structures in the scheme plus extensive retaining wall construction through Green Lanes Roundabout.  There are 6 subways, 2 footbridges and 4 large road bridges over the motorway. All of the structures are of traditional reinforced concrete except for the OIdings Interchange bridge where the bridge was built on line with the necessity to keep the Al open and running. This requirement precluded temporary shuttering for an insitu concrete deck, thus precast prestressed concrete `U' beams lifted into position under a short-term temporary closure of the A1 formed part of the main span of the bridge.

 The route of the new motorway necessitated the demolition of over 200 properties, many of them commercial, but on completion the land above the tunnel was again made available for development together with areas immediately adjacent to the tunnel line which were acquired by Welwyn Hatfield District Council, so bringing the entire area into public ownership.

On June 12th 1984 the Welwyn Hatfield District Council unanimously selected as their development partner the Carroll Group of companies who put forward the futuristic Park Plaza plan.  With the comprehensive leisure theme which is the underlying feature of the scheme the focus of the proposed development was a 200,000 sq ft. glass covered shopping area situated over the southern section of the tunnel and containing a variety of leisure orientated retail units. Included in this totally new retail concept is an ice skating rink, restaurant, exhibition and activity areas. Covered ways link this centre to a 100-bedroom prestige hotel, enclosed garden centre and further open leisure activity areas. The proposed scheme also contains a small residential zone and a prestige office development at the northern end of the site.

Alconbury (Huntingdon) to Peterborough

 The other length of the A1 in the Eastern Region which has been improved as a motorway is on the Alconbury to Peterborough stretch, opened in October 1998 by Lord Whitty. This follows the corridor of the Stilton Bypass which catered for all-purpose traffic, but moves the alignment eastwards away from the village.

This improvement to motorway standard was needed primarily for safety reasons. It was the busiest length of the A1 which had not been raised for motorway standard. In 1961 it carried over 50,000 vehicles a day, of which about 1 in 5 were lorries; there was extensive congestion at peak times with regular queues of traffic up to five miles long; traffic was expected to double over the next 30 years; existing side road and property accesses were a source of danger to local and through traffic.

The total length of motorway is about 14 miles, with four lanes northbound and southbound, each with hard shoulder between Alconbury Hill and Norman Cross. Safety for through and local traffic is improved by the provision of a separate local road system.

Tenders for the project were invited in May 1995 under the new procedures on a "Design Build Finance and Operate" basis over a 10-year period. Tenders were returned by February 1996 and the successful tenderer, (Road Management Services, a joint venture of AMEC, Alfred McAlpine, Brown & Root and the Spanish firm Dragados) was appointed in April 1996, with work starting in May 1996.

Under the terms of this "DBFO" contract, payment is made in stages over the 30-year period based upon automatic continuous counting of the number of vehicles (shadow tolls). There is no stopping of vehicles and no payment of tolls to the drivers of vehicles it will be no different from a conventional motorway. The contract embodies performance incentives to provide a high level of service, ensure liaison with interested parties and protection of the environment. This private financing has enabled the upgrading of the A1 to take place earlier than would be possible under previous public financing arrangements.

Contract details:

Section Length Engineer Contractor Cost
South Mimms to Roestock (J1 to J2) 3m Herts Sub-unit Higgs & Hill £3.6m
Roestock to Stanborough (J2 to J4) 3m Herts CC Tarmac (now Carrilion Construction) £36.9m
Stanborough to Welwyn (J4 to J6) 3m Herts Sub-unit A F Budge £2.2m
Stevenage By-pass (J6 to J8) 7m Herts CC Martin Cowley £1.8m
Baldock By-pass (J8 to J10) 7m Herts CC A Monk £3.5
Alconbury to Peterborough (J13 to J17) 14m DBFO contract: AMEC, A McAlpine,Brown & Root & Dragos   ?


Key dates

A(1)M Part of the A1 Strategic North - South Link
Construction dates

Section Construction started Opened to traffic
South Mimms to Roestock (J1 to J2) ? May 1979
Roestock to Stanborough (J2 to J4) April 1984 December 1986
Stanborough to Welwyn (J4 to J6) ? May 1973
Stevenage By-pass (J6 to J8) ? May 1962
Baldock By-pass (J9 to J10) ? July 1967
Alconbury to Peterborough (J13 to J17) May 1996 October 1998


Archive information

A(1)M Part of the A1 Strategic North - South Link
Location of full archive.

The full archive for this scheme is stored at:

Northamptonshire Record Office, Wootton Hall Park, Northampton, NN4 8BQ

Its accession number is: 2003/86

The Office may be contacted by phone on 01604-762129, by fax on 01604-767562, or by Email


List of material held in the Northamptonshire CC Record Office

Motorway Archive/Eastern Region/A1(M)/


  1. Booklet, Official Opening of A1 Stilton Bypass by The Rt Hon Harold Watkinson, Minister of Transport and Civil Aviation, 21st July 1958, 7pp

  2. Site Brochure, A1(M) Motorway, Roestock to Stanborough, Hertfordshire County Council Publication, 1985?, 1p

  3. Site Brochure, A1(M) Motorway, Roestock to Stanborough, What's Happening?, 1984, 1p

  4. Journal, A1(M) Tunnel at Hatfield. A Motorway and Redevelopment Package. The Department of Transport View, D I Evans, A County View, M F Hardy, A District View, L Asquith, Highways and Transportation Journal, December 1986, pp 4 to 12, tota19pp

  5. Photos, A1(M) Hatfield Tunnel Open Day, October 1986, 17 no Aerial View After Construction, 1990, 3 no

  6. Press Notice, New A1(M) Section Will Aid Communications with The North, Peter Bottomley, 10 December 1986, 3pp

  7. Folio, The Hatfield Redevelopment Area, Invitation Document, September 1983, 10pp and 2 plans

  8. Folio, A1(M) Hatfield Tunnel, The Galleria-Retailing's Magnificent Obsession, 9pp 2 folios and 5 plates

  9. Press Notice, A1 to become Motorway, Cecil Parkinson, 3 July 1990, 3pp

  10. Cutting, A1 will be new M-way, Cambridge Evening News, 3 July 1990, 1p

  11. cutting, Go-ahead for £1bn A1 upgrade, Construction News, 5 July 1990, 1p

  12. cutting, A1 survey under way, Baldock-Alconbury, Cambridge Evening News? 17 August 1990, 1p

  13. Brochure, A1 Improvement South of Brampton Hut, Opening 10th December 1990, 2pp

  14. Brochure, A1 (M) Motorway Baldock to Alconbury, Motorway Proposals, Explanation of Scheme for Public Consultation, 22nd September 1994, 6 fold sheet

  15. Brochure, A1(M) Motorway, Peterborough to Stamford and Stamford Bypass, Public consultation, Highways Agency, Autumn 1994, 6 fold and 2 fold sheets

  16. Brochure, A1 London to Peterborough, Route Management Strategy, Public Consultation, Autumn 2001, Highways Agency,4 fold and 3 fold sheets

  17. Notes, talk to Women's Institute audience of about 300 at annual Huntingdon and Peterborough Federation meeting on A1 Motorway and other roads in the Huntingdon and Paterborough area, D I Evans, 8th April 1997, 9pp and other pamphlets

  18. List and Drawings, Abstract of print list from Cambridgeshire Shire Hall, 2pp, Plan and Longitudinal Section, Huntingdonshire County Council for A1 Great North Road schemes from Alconbury Bypass to Conington, 1961?, 22 sheets

  19. Text and illustrations, A1 Alconbury to Fletton Parkway Widening, Landscape Appraisal, Cambridgeshire County Council, August 1990, 46 approx plus copies

  20. Photos, A1 Alconbury to Fletton Parkway, footpath locations with descriptions, 6 sheets, 3 footpaths on each

  21. Drawings, A1 Alconbury to Fletton Parkway, Scheme plans, 17 approx

  22. Drawings on film, A1 Alconbury to Fletton Parkway, Statutory Order plans, 25 approx

  23. Cutting, The Road to Danger, Plans to upgrade A1 stretch to motorwas, Hunts Post, 8th January 1987, lp

  24. Leaflet, New Agents for Area 8 Trunk Road Maintenance and Improvement Starting April 1997, Highways Agency, 3 fold

  25. Leaflet, A1 Norman Cross Improvements, Department of Transport, Invitation of Comments, March 1990, lp

  26. Brochure, A1 Motorway, Alconbury to Peterborough, explaining and inviting emquiries about motorway proposal, Department of Transport, 1990?, 3 fold

  27. Report, A1 Motorway, Alconbury to Peterborough, Environmental Statement, Department of Transport, 1991. 95pp plus 14 figures

    Documents on deposit for public at Public Inquiries:

  28. Notice, A1 Alconbury to Fletton Parkway Improvement, Opening Statement on behalf of the Department of Transport, October/November 1991, (PET 1/1), (Public Inquiries started September 1992), 2pp

  29. Folder No 1. The A1 Trunk Road, Alconbury to Fletton Parkway Improvements (including B660 Glatton Junction), Public Notice, Explanatory Statement, Schemes and orders, 8 sections

  30. Folder No 2, The A604 Trunk Road, Alconbury to A1 Improvements, Public Notice, Explanatory Statement, Schemes and Orders, 7 sections

  31. Folder No 3, The A1 Trunk Road Alconbury to Fletton Parkway Improvements, Public Notice, Explanatory Statement, Order, 3 sections

  32. Statement by the Department of Transport's Representative for A1 Alconbury to Fletton Parkway Improvement, B660 Glatton Junction Improvement, A604 Alconbury to A1 Improvement regarding the Upgrading of the Existing Trunk Road to Motorway Standard, Side Road Proposals and the Draft Compulsory Purchase Orders at Public Inquiries opened on 29 September 1992, (D1 and PET 1/2), 47 pages

  33. A: Folder of Press Notices, (D2), 3 no, 253 A1 to become Motorway - Cecil Parkinson, 3 July 1990, 4pp. E146/91 A1 Upgrading to Motorway between Alconbury and Peterborough 23 October 1991. 4pp. ET69/92 Public Inquiries for A1 Improvements Alconbury to Peterborough, 6 August 1992, 2pp

    B: Loose-leaf, Proposed Modifications to the Draft Side Roads Orders--Description, (PET 1/3) 9pp

    C: Spring-bound, Proposed modification to the Draft Side Roads Orders - Plans, (PET 1/3A), 30pp

  34. Booklet, Policy for Roads in England: 1983, Department of Transport, HMSO Cmnd 9059, ISBN 0 10 190590 4, (D3a), 53pp

  35. Copy of Booklet, Policy for Roads in England:1987,1, Department of Transport, HMSO. (D3b) 14pp

  36. Copy of Booklet, Policy for Roads in England:1987,2, Trunk Road Construction Programme, Department of Transport, HMSO, (D3b) 55pp

  37. Copy of Booklet, Roads for Prosperity: 1989, Department of Transport, HMSO, Cm 693, (D3c), 20pp

  38. Copy of Booklet, Trunk Roads, England. Into the 1990's, Department of Transport, HMSO, ISNB 0 11 550952 6, (D3d), 78pp

  39. Extract from 38 above, 20pp and 35 above, lp

  40. Extra copy of Public Notice in 29 above (D5), 9pp

  41. Copy of covering letter and Public Notice, llpp

  42. Sheet, A1 Motorway, Alconbury to Peterborough, Environmental Statement, Non-technical Summary, September 1991, (D6), 5 fold (See full Report at 27 above)

  43. Statutory document, Highways Act1980, Chapter 66, HMSO, Reprinted 1988, (D12), 358pp

  44. Booklet, Getting the best roads for our money, The COBA Method of Appraisal, Department of Transport, (D13), 28pp

  45. Tome, Amendments to COBA Manual, (D14), 71pp plus 7 sections

  46. Folder, Quadro 2 Manual for Traffic Forecasts, 1989, (D15), 6 sections

  47. Folder, Manual of Environmental Appraisal, 1983, (D22), 11 sections

  48. Note, Manual of Environmental Appraisal, Assessment of Visual Intrusion, Note on Current Practice, 1988, (D22a), 2pp

  49. Booklet, Road Layout and Geometry: Highway Link Design, Departmental Standard TD9/81, 1986, (D25), 110pp approx

  50. Leaflet, Police Observation Platforms on Motorways, Departmental Standard TD10/81, (D25b), 5pp

  51. Leaflet, Use of Certain Departmental Standards in the Design and Assessment of Trunk Road Schemes, Departmental Standard TD11/82, (D25c), 4pp

  52. Leaflet, Frameworks for Trunk Road Appraisal, Departmental Standard TD12/83, (D25d), 7pp

  53. Leaflet, The Geometric Design of Roundabouts, Departmental Standard TD16/84, (D25e), llpp

  54. Leaflet, Criteria for the Provision of Closed Circuit Television on Motorways, Departmental Standard TD17/85,(D25f), 4pp

  55. Leaflet, Criteria for the use of Gantries for Traffic Signs and Matrix Traffic Signals on Trunk Roads and Trunk Road Motorways, Departmental Standard TD18/85, (D25g), 5pp

  56. Leaflet, Safety Fences and Barriers, Departmental Standard TD19/85, (D25h), 15pp

  57. Leaflet, Design of Road Lighting for Motorway Trunk Roads, Departmental Standard TD34/91, (D25i),llpp

  58. Leaflet, Layout of Grade Separated Junctions, Departmental Standard TD22/86, (D25j), 28pp

  59. Leaflet, Cross Sections and Headroom, Departmental Standard TD27/86, (D25k), 15pp

  60. Leaflet, Loads for Highway Bridges, Departmental Standard BD37,88, (D25m),86pp

  61. Leaflet, The Assessment of Concrete Highway Bridges and Structures, Departmental Standard BD44/90, (D25n), 113pp

  62. Leaflet, Junctions and Accesses; Determination of Size of Roundabouts and Major/Minor Junctions, Departmental Advice Note TA23/81, (D26a), 61pp

  63. Leaflet, Junctions and Accesses: the Layout of Major/Minor Junctions, Advice Note TA20/84, (D226b), 88 approx

  64. Leaflet, Deflection Measurement of Flexible Pavements, Departmental Advice Note HA/25/83, (D26c), 15pp

  65. Leaflet, Choice between Options for Trunk Road Schemes, Departmental Advice Note TA30/82, (D26d), 31pp

  66. Leaflet, Edge of Pavement Details, Departmental Advice Note HA39/89, (D26e), 20pp

  67. Leaflet, Edge of Pavement Details, Deprtmental Advice Note HA39/89, (D260), 48pp

  68. Leaflet, Highway Link Design, Departmental Advice Note TA43/84, (D26g), 126pp approx

  69. Leaflet, Capacities, Queues and Delays at Road Junctions, Departmental Advice Note TA 46/85, (D26h), 4pp

  70. Leaflet, Traffic Flows and Carriageway Width Assessment for. Rural Roads, Departmental Advice Note TA46/85, (D26i), 16pp

  71. Leaflet, Layout of Grade Separated Junctions, Departmental Advice Note TA46/86, (264), 29pp approx

  72. Leaflet, Approval of New and Replacement Lighting on Trunk Road Motorways, Departmental Advice Note TA43/86, (D26k), 37pp approx

  73. Leaflet, Roadside Features, Departmental Advice Note TA57/87, (D261), 59pp

  74. Leaflet, Noise Barriers - Standard and Materials and Amendment No 1, Technical Memorandum H14/76, (D30), 23pp

  75. Letter, Routes for Heavy and High Abnormal Loads, Department of the Environment. 7 November 1972, 2pp plus 2 maps

  76. Proof, A1 Trunk Road (Alconbury to Fletton Parkway Improvement), Traffic and Economic Issues, Proof of Evidence by Michael John Hampton, (PET1/4), 18pp

    A: Attachments to the Evidence, (PET1/4A),16pp

  77. Proof of Evidence of the Department of Transport's Landscape Witness on the Draft Landscape Proposals, A1 Trunk Road ("), (PET1/5), 27pp

    A: Appendices and maps with 77, (PET1/5A)/12pp

  78. Proof of Evidence on Agriculture, ("), (PET1/6), lOpp

  79. Proof of Evidence on Planning and Environment Issues, ("), (PET1/6), lOpp

  80. Proof of Evidence on Air Quality Issues ("), (PEI1/8), 20pp

  81. Proof of Evidence on Noise Issues, ("), (PET2/1), 33pp

  82. Proof of Evidence on Alternative Proposals Suggested by objectors, 4pp

  83. Citizens' Charter, Cambridgeshire County Council, Road Building, Traffic and Road Safety, Public Transport, Maintaining our Roads, llpp

  84. Leaflet, A1 Motorway, Alconbury to Peterborough, Road Management Services (Peterborough) Limited, Map of the Scheme and Description, What's happening to the A1? What will it look like? 2 fold

  85. Folder, Opening of the new A1(M) Motorway Alconbury to Peterborough, Press Notice, Press Cuttings, Literature on Design, Build, Finance and Operate (DBFO) projects, environmental aspects, maps and aerial photo, 31 October 1998. 85pp approx

  86. Brochure, A1(M) Alconbury to Peterborough, DBFO road improvements, Highways Agency/RMG project completion,October 1998, 3 fold

  87. Report, Sample Trenching at Norman Cross, Cambridgeshire, 1990-91, An Archaeological Evaluation, Ian Meadows, Archaeological Officer, Peterborough City Council, 4pp

  88. Report, Archaeological Evaluations at South Farm, Upton, near Huntingdon, T Sutherland, Cambridgeshire County Council, 1995, 8pp

  89. Report, Archaeological Evaluation at Toon's Lodge, Haddon, E Guttman, Cambridgeshire County Council, 1995, 5pp

  90. Report, Evaluation of the Roman Road at Sheep Lair Farm, Folksworth, S N Kemp, Cambridgeshire County Council, 1995, 27pp

  91. Report, Further Archaeological Evaluation at Shep Lair Farm, Folksworth, T Sutherland, Cambridgeshire County Counci1,1995, 9pp

  92. Report, Archaeology on the A1 between Alconbury and Fletton Parkway, Stage 3 Assessment, Volume 1, S Kemp and T Reynolds, Cambridgeshire County Council, 1995, 33pp

  93. Report, ", Volume 2, 229pp approx

  94. Folder of Press Releases/Cuttings etc, Pupils' letters and drawings after Ray Powell's visit 1992, A1 Alconbury to Fletton Parkway Widening, period 1989 to 96, about 5 cm thick

  95. Paper, East Coast Route Catalyst, R Lane, D I Evans and P F Wilkes, Proceedings of the Institution of Civil Engineers, Civil Engineering: September 1992, p158 to 165, 8pp inc illustrations (A report of the investigation of the feasibility of a new north-south road in Eastern England some 230 miles long between Cambridgeshire and Tyneside)