A21 Tonbridge to Pembury Dualling
Part of our programme of improvements (value >10m)
The first phase of traffic management will begin at the end of April when we will be setting up a 40mph speed limit on the A21 throughout the scheme length for the safety of our workforce and that of the travelling public. We will also be implementing a right turn ban for traffic entering or leaving Half Moon Lane or Pembury Walks. This will improve the flow of traffic on the A21 and also reduce the potential of increased rat running through the villages on the east side of the scheme.
Translocation of Woodland
Site clearance and environmental mitigation have been the first significant phase of the scheme. As part of this, we have been undertaking necessary translocation of coppiced trees, some shrubs and topsoil from the Ancient Woodland areas. This, together with new trees and shrubs, will be re-planted in several woodland creation areas next to the scheme. Work is now almost complete and there is already evidence of the bluebells growing in the new receptor areas. Part of our translocation work also required the removal of a rare fungi bank (hydnellum concrescens) which has been moved to an area away from the main construction sites.
Our archaeology consultant, Oxford Archaeology, has been monitoring the early construction activities. Only once areas have been confirmed clear of anything of archaeological interest can machinery be allowed in to start work. This is called a ‘watching brief’ and will continue until the archaeologists are content no artefacts or interesting features are likely to be found.
The barn and stable block at May Day Farm have now been dismantled. Specialists from the Weald and Downland Open Air Museum have been recording the demolition and marking different elements of the buildings so they can be re-erected at the Museum.
We have had another month of preparatory works with the biggest milestone being our move into our new project offices. Access to it is directly off the A21 but just north of Half Moon Lane.
April will see an increase in the machinery on site as we begin the main construction works. Initially we will be focussing on the area around Longfield Road roundabout where we will be constructing new slip roads. Once these slip roads are completed traffic will be diverted onto them to free up the existing A21 corridor, allowing us to begin constructing the new bridge which will take the A21 traffic over the top of the local side road traffic.
What is happening?
We are proposing to upgrade the existing single carriageway A21 between Tonbridge and Pembury to dual 2-lane carriageways.
The new dual carriageway will broadly follow the line of the existing A21 with a new grade separated junctions at Fairthorne (by the petrol station) and at Longfield Road, replacing the existing roundabout at the southern end of the scheme. At the northern end, there will be a minor change to the line of the slip road from the Vauxhall Lane roundabout where it joins the A21.
Parts of the existing A21 will be retained to provide access to houses, businesses, fields and woodland. A new bridleway for pedestrians, cyclists and horse riders will be provided along the whole length of the scheme. A new footbridge will be provided across the Pembury Bypass at Blackhurst Lane, replacing the existing crossing.
When and where is this happening?
The A21 links the Hastings/Bexhill and Tonbridge Wells/Tonbridge conurbations to the M25 and the trunk road network.
A draft Compulsory Purchase Order, Highways Act Orders and an Environmental Statement were published in December 2009 and a public inquiry was due to take place in July 2010. However, the public inquiry was postponed pending the outcome of the government’s October 2010 spending review. In the October 2010 spending review announcement the scheme was listed as one of those for which design and planning work would continue so that construction could start in the early years of the next spending review period (post 2015).
On 8 May 2012, the Roads Minister Mike Penning, announced that funding would be provided to develop the A21 Tonbridge to Pembury Dualling scheme, to ensure a "pipeline" of future Highways Agency major infrastructure improvements will be maintained, contributing to future economic growth, and supporting government's National Infrastructure Plan.
A Public Inquiry for the scheme was held between 14 May and 9 July 2013 and the Secretary of State's decision confirming that the scheme will go ahead was announced on 1 May 2014.
The decision letter and the Inspector's report of the Public Inquiry are on the Department for Transport’s website at:
The contract to build the scheme was awarded to Balfour Beatty on 9 July 2014.
Some site clearance and advance environmental mitigation work started in September 2014 with the main construction work starting in spring 2015. Construction will take approximately 2 years.
Why is this happening and what will it cost?
The A21 links the Hastings/Bexhill and Tonbridge Wells/Tonbridge conurbations to the M25 and the trunk road network.
Between the M25 and Tonbridge the A21 is a dual 2-lane carriageway standard with grade separated junctions, limited access and no central reserve gaps. Between Tonbridge and Pembury the standard drops to single carriageway with poor horizontal and vertical alignment and many individual accesses to properties, farm fields and woodlands. Approximately half way along the scheme there is a petrol station on the east side and junctions with two minor roads, Dislingbury Road and Pembury Walks, either side of the petrol station. This causes traffic congestion and delays on the A21, particularly due to right turning traffic. There are no footways and verges are either very narrow or non-existent.
This single carriageway section of the A21 experiences severe congestion throughout the day and particularly at peak times and has a poor accident record with an average accident rate (expressed as accidents per million vehicle kilometres) about 20% higher than the default value for a road of this type.
Between Tonbridge and Pembury the A21 passes through a very environmentally sensitive area with landscape, cultural heritage, ecological and settlement issues being key constraints to route improvements. Almost the entire route is within the High Weald Area of Outstanding Natural Beauty (AONB) and being an historic route, largely follows the landform. Further details of the environmental impacts of the scheme and proposed mitigation measures are on the environment page of this website.
The estimated cost of the scheme is in the range between £59.0m and £78.6m with a most likely cost of £69.7m.
How will the scheme be carried out?
Several options were considered before the "Preferred Route" was announced in 2003 which protected the line of the proposed scheme for planning purposes. The proposed scheme broadly follows the line of the existing A21.
At the northern end, there would be a minor change to the line of the slip road from the Vauxhall Lane roundabout. A new two level junction, called a "grade separated" junction, will be provided at Fairthorne roughly half way along the scheme. At the southern end the existing roundabout at separated junction. A new footbridge will be provided across the Pembury Bypass at Blackhurst Lane.
Parts of the existing A21 will be retained to provide access to houses, businesses, fields and woodland. A new bridleway for pedestrians, cyclists and horse riders will be provided along the whole length of the scheme.
To help us understand the impacts on the environment for these improvements, we have undertaken an environmental impact assessment of the proposals - this is recorded in an Environmental Statement (ES) and a Non Technical Summary (NTS) leaflet of the ES. The full Environmental Statement, Explanatory Statement and Non Technical Summary leaflet can be viewed on the Publications section of this schemes website. An updated and revised ES will be published before the Public Inquiry.
What are the benefits?
The main objectives of the scheme are to:
- Relieve congestion
- Improve safety for all road users
- Improve journey time reliability
The environmental objectives of the scheme are to:
- Mitigate the impact of the scheme on the AONB.
- Minimise the adverse impact on the RSPB reserve and the Scheduled Ancient Monument.
- Minimise the impact on ancient woodland.
How do I find out more information ?
More information will be posted on this project page as it becomes available. You can subscribe to be alerted when updates are made.
If you have any queries about this project you should contact the Highways Agency Information Line by emailing firstname.lastname@example.org or calling 0300 123 5000.
Will there be roadworks?
From the 27 April 2015 the main construction works along the A21 between Tonbridge and Pembury will begin. A 40mph speed limit and metal safety barrier will be put in place throughout the works area to protect the road user and workforce. Construction activity in the areas adjacent to the A21, where all the trees have been removed from, will then begin.
How will you manage traffic?
At the Vauxhall Lane / A26 section of the A21, traffic will be separated prior to the southbound off-slip into two dedicated lanes. Lane one will be used for traffic wishing to enter the A26 and the A2014. Lane 2 will be used for through traffic wishing to remain on the A21.
We will also be implementing a right turn ban for traffic entering or leaving Half Moon Lane, Pembury Walks or Fairthorne garage. This will improve the flow of traffic on the A21 and also reduce the potential of increased rat running through the local villages.
Will there be diversions?
In this early phase of installing the traffic management it will be necessary to close the road overnight on 27, 28 and possibly 29 April.
The closures will be in place from Vauxhall Lane / A26 Tonbridge through to the A228/A264 junction and will be effective from 20:00 hours to 06:00 hours the next morning. A fully signed diversion route will be in place. During most of the construction work, unless there is an emergency situation, there will be no need for the road to be closed during the day. Occasional further night closures may be required and these we will update here when they are confirmed.
A21 Northbound Closure times & actual closure points
- Longfield Road roundabout to Vauxhall Lane off-slip, 20:00 to 06:00 each night
- A264/A228 junction with the A21 to Longfield Road, 22:00 to 06:00 each night.
Access to North Farm - this is not a formal diversion route, so will not be signed, but is a suggested alternative.
- Access straight over the roundabout from Tonbridge Road to Longfield Road will be possible during these closures. Vehicles needing access to the business park areas after 22:00 hours should leave the A21 at the closure point (A264/A228 junction), turn left at the traffic lights onto Tonbridge Road, go past the hospital and then across the A21 roundabout onto Longfield Road.
A21 Southbound Closure times & actual closure points
- A26 London Road / Quarry Hill junction to Longfield Road roundabout, 20:00 to 06:00 each night.
Access to North Farm
- Via main diversion route below until just before the A228 joins the A21, then see suggested route above.
When heading northbound the route will be to leave the A21 at the A264 / A228 junction; take the A228 towards West Peckham; turn onto the A26 through Hadlow, following the diversion route along the B2260 (High Street), back to the A26 then re-join the A21. The southbound route will be in reverse.
The scheme passes through a very sensitive area in environmental terms with landscape, cultural heritage, ecological and property issues being key constraints to route improvements. The scheme is almost entirely within the High Weald Area of Outstanding Natural Beauty ("AONB"). There is a scheduled Ancient Monument (Castle Hill Fort) close to the northern end of the scheme and an RSPB reserve at the south eastern end of the scheme. There are a number of ancient woodland sites to the existing A21.
We have surveyed the local area to assess the effect the scheme will have on the landscape and on plant and animal life. The results of the surveys and the measures we propose for reducing the effect of the scheme are contained in the Envrionmental Statement and are summarised in the Non Technical Summary of the Environmental Statement. The link to these documents can be found on the ‘publications’ tab.
During construction we will use best practice to safeguard the local environment and will plan the construction works to minimise adverse effects on the local community and the environment.
The scheme entails the unavoidable loss of 9Ha of Ancient Woodland for which 18Ha of translocated and planted woodland will be provided in mitigation. These areas will be managed for 25 years. In addition, 27Ha of existing woodland will be managed for 10 years while the new planting becomes established.
Local Communities and Land Use
Parts of the existing A21 will be retained to provide access to houses, businesses, fields and woodland. Earthmounds and planting will be used to screen the A21 from properties, with noise fences included where they will be effective.
The scheme will require additional land, most of which is good quality arable farmland or woodland. Four houses and one barn will need to be demolished to build the scheme.
A new route for pedestrians, cyclists and horse riders will be provided along the length of the scheme, and an additional pedestrian and cycle bridge provided at Blackhurst Lane to facilitate access to Pembury Hospital.
Noise and Vibration
Noise fences and earth mounds with planting will be provided to ensure that all residences currently close to the line of the existing A21 experience a reduction in noise level. Other areas further away from the A21 may experience a negligible increase in noise levels.
The majority of affected residential properties may experience improved local air quality as a result of the scheme proposals and because of the reduced traffic congestion. Air pollutant concentrations at properties near to the road will not exceed the levels that are set to protect human health.
Substantial areas of trees, shrubs and grassland will be planted, with the intention of fitting into the existing pattern of hedgerows, woodlands and pasture fields. Native species that are local to the area will be used where possible. The new junctions and road bridges will initially be intrusive features of the scheme but over time the extensive planting will create effective screening.
Wildlife and Nature Conservation
The Tonbridge to Pembury section of the A21 comprises a variety of habitats including woodland, hedgerows, grassland, streams and ponds.
Protected species found during our surveys include bats, dormice, badgers, breeding birds, great crested newts and reptiles. Although areas of woodland will be lost to the scheme, a wide variety of mitigation measures have been included to limit or compensate these impacts. The project team has consulted with statutory bodies to ensure that with mitigation the long-term effects on most species will be neutral, and the character of the landscape preserved.
The existing water environment will be protected by using drainage balancing and treatment ponds and facilities to contain pollutants. These measures will improve the quality of the water draining from the road system and ensure that there will be no increased risk of flooding in the area.
The scheme runs through the High Weald an area inhabited by man for at least 6000 years. There is evidence of Iron Age, Roman and Medieval activity in the wider landscape. The High Weald landscape is formed of small fields and woodlands dating from Medieval and Saxon periods and the scheme has been designed to retain this historic form of the landscape.
So that the scheme has no effect on the Castle Hill Iron Age hillfort it will be necessary to demolish a Grade II listed farmhouse and barn. As a condition of the planning consent we will photograph and record the buildings before demolition and the barn will be carefully taken down and re-erected at a historic buildings museum. (The farmhouse itself is not unique and has been altered a lot during its lifetime, so does not warrant re-erection).
Translocation of Woodland
We have coppiced trees along the route so that they are ready for translocation (with woodland soils to retain the seed bank) into the nearby 'receptor areas'. Unfortunately we cannot move every tree as some will not survive, for example those with extensive infestation. In total, 9 hectares of woodland have been coppiced and translocation will begin in early 2015.
Our woodland translocation is one of a combination of woodland creation measures that we will use to create 18.1 hectares of woodland in areas bordering the new dual carriageway. Other woodland creation measures include new planting and natural regeneration, which we will start early 2015.
In addition to the trees we have also been preparing to translocate an earth bank rich in woodland fungi along with hedgerows in the northern end of the scheme.
Coppicing involved protecting dormice, bats and other wildlife, which included undertaking works during autumn in order to avoid sensitive breeding and hibernating periods.
Dormice - We have installed 150 dormice boxes in areas of 'dormice' vegetation that will be retained, in order to provide resting places for dormice while the new woodland becomes mature. We will install a further 100 dormice boxes as the new woodland takes hold. We have also installed 25 of our 36 bat boxes, with the remaining being installed early 2015.
Reptiles & Amphibians - 165 reptiles and 1 amphibian were trapped under licence from Natural England within the works area where you may have notices low level plastic fencing. These creatures were moved to safe areas close to where they were captured.
Archaeology & Cultural Heritage
Prior to beginning any translocation or construction activities we have undertaken an archaeological watching brief to check for possible areas of interest. We record any significant features that we find and aim to preserve these where possible.
Business Case - Information correct as at December 2010
A21 Tonbridge to Pembury Dualling Public Exhibition Information
Revised Environmental Statement 2013 - Addendum - May 2013
Notice for addendum to Revised Environmental Statement
The Highways Agency's Full Statement of Case in respect of the applications for demolition of listed buildings issued under Rule 6 of the Town and Country Planning (Inquiries Procedure) (England) Rules 2000.
The Highways Agency's Full Statement of Case in respect of the draft Orders under the Highways Act 1980 issued under Rule 6 of the Highways (Inquiries Procedure) Rules 1994 and Rule 7 of the Compulsory Purchase (Inquiries Procedure) Rules 2007.
Public Inquiry Notice for the A21 Tonbridge to Pembury Dualling scheme.
A21 Tonbridge to Pembury Dualling Pre Inquiry Meeting Notice - 1 March 2013
Outline Statement of Case in respect of Application for the Demolition of Listed Buildings - February 2013
A21 Tonbridge to Pembury Dualling Department for Transport Highways Act 1980 - Notice February 2013
A21 Tonbridge to Pembury Dualling Compulsory Purchase of Land and Rights between Tonbridge and Pembury in Kent - Notice February 2013
A21 Tonbridge to Pembury - Outline Statement of Case - January 2013
Public Inquiry Notice
Public Inquiry Notice documents 2010
This document is available on The National Archive website:
Revised Environmental Statement, Non-Technical Summary of the Environmental Statement and Statement Explaining the Proposals
Full Statement of Case, Statement of Case - Listed Buildings, Statement of Case - Listed Buildings Appendix A
Appraisal Summary Table
These videos shows a computer-generated model of the A21 Scheme.
They illustrate how the scheme will look 15 years after opening, with trees between 5-7m in height and realistic traffic volumes.
The video sequence contains the following sections:
Vehicle movements at the new junctions (Fairthorne Junction and Longfield Road Junction)
Fly-through of the scheme in a southbound direction
Drive-through in both northbound and southbound directions
Please note that these videos are hosted on the Highways Agency's You Tube channel. If you are not able to access videos on You Tube you will be unable to view them.