A2 road noise: how it affects nearby properties
The A2 is the historic London-to-Dover route and carries motorway-level traffic on its dual-carriageway sections through south-east London and Kent, with a heavy freight flow bound for the Channel ports. Homes near the A2 in Bexleyheath, Dartford or along the Kent sections can face conditions closer to a motorway than a typical A-road.
Traffic on the A2: what the 2025 DfT counts show
The A2's median count point carries only 20,200 vehicles a day, but its ninetieth percentile is 121,200, about six times as much. That is the whole story of the road in two numbers. Of 102 points, 19 exceed a hundred thousand and 26 exceed fifty thousand, while 4 are under ten thousand. The busiest reading is 157,821 and the quietest 2,003. The lower quartile is 15,600 and the upper quartile 56,100, so most of the road is moderately used and a minority of points carry motorway-scale flows. A single A2 number therefore means very little.
The A2 climbs steeply in traffic towards London. The 15 count points nearest the south-eastern end have a median of 19,500 vehicles a day, the 36 in the middle 17,200, and the 51 in the western third 38,300, with the road's maximum of 157,821 in that last third. The middle third still holds a reading of 128,850, so heavy sections occur in the Kent middle too. Over about 72 miles from Southwark to Dover Eastern Docks, the route includes the Rochester Way Relief Road in south-east London, widening from three to four lanes each way between Pepperhill and Cobham, and enlarged junctions at Bean and Ebbsfleet near Bluewater.
Dover traffic gives the A2 a lorry reputation, yet its measured median is 4.2 per cent heavy goods vehicles, with the ninetieth percentile at 8.1 and a maximum of 15.1. The lowest is 0.4. So the typical count point is not especially lorry-heavy, and a few links or sections reach much higher. The indicative levels below use 4.2 per cent, which suits the commuter-dominated sections more than a freight-heavy one.
| Quarter of points carry under | 15,600 vehicles/day |
|---|---|
| Median point | 20,200 vehicles/day |
| Three-quarters carry under | 56,100 vehicles/day |
| Busiest tenth carry over | 121,200 vehicles/day |
| Busiest single point | 157,821 vehicles/day |
The A2 on the ground
- About 72 miles long, from Southwark in London to Dover Eastern Docks, joining the M2 at Three Crutches near Strood. en.wikipedia.org
- The Rochester Way Relief Road section in south-east London, opened in 1988, bypasses Kidbrooke and Eltham with a 50mph limit. en.wikipedia.org
- Pepperhill to Cobham was widened from three to four lanes each way in 2006-09, moving traffic onto a new carriageway. democracy.kent.gov.uk
- Bean and Ebbsfleet junctions near Bluewater were enlarged, with a new bridge over the A2 at Bean, officially opening on 30 June 2023. nationalhighways.co.uk
- The Lower Thames Crossing adds an A2 junction at Gravesend's eastern edge; the A2 stays four lanes each way, rebuilt for about 2 miles east. highwaysengland.co.uk
How loud is the A2, and how fast does it fall away?
Eight decibels separate a typical A2 from a busy one at close range. At 20 m on open flat ground the median flow of 20,200 vehicles a day gives 67 dB Lden, while the ninetieth percentile flow of 121,200 gives 75. At 50 m the figures are 64 and 71, at 100 m 61 and 69, and at 200 m 59 and 66. They assume a 50 mph speed, 4.2 per cent lorries and no screening at all. In south-east London the A2 often has existing barriers and dense frontage, which can lower the real figure, and even the quiet column at 200 m is above WHO's 53 dB guideline.
| Flow | 20 m | 50 m | 100 m | 200 m |
|---|---|---|---|---|
| Typical section (20,200 vehicles/day) | 67 | 64 | 61 | 59 |
| Busiest tenth of sections (121,200+ vehicles/day) | 75 | 71 | 69 | 66 |
Areas near the A2
Passing through: Greater London · Kent.
Dense residential frontage lines the A2 through south-east London, often with existing noise barriers, while the Kent sections towards Canterbury and Dover pass closer to open country. AcoustaPlot calculates road noise along the A2 for your specific address and labels what each part of the estimate rests on, so you know how it was reached.
Recent on the A2
National Highways completed a £112 million scheme in July 2022 upgrading the A2's Bean and Ebbsfleet junctions in north-west Kent, near Bluewater, building a new bridge and extra slip road at Bean and enlarging the signal-controlled roundabouts at Ebbsfleet.
Source: https://www.kentonline.co.uk/dartford/news/work-starts-on-112m-upgrades-to-a2-junctions-231915/
How AcoustaPLOT assesses A2 noise for your property
With 102 DfT count points on the A2, AcoustaPLOT looks for one on this same road within 8 km along it and takes that point's measured flow and lorry share, so a home beside a 157,821 point and one beside a 2,003 point start from very different traffic. It then adds the real distance, terrain, ground, the houses and barriers lining the road in south-east London, and other roads or rail. The estimate says which parts rest on measurement and which on assumption, such as speed. It reports the day-evening-night (Lden) and night-time (Lnight) levels at your facade, and reads Defra's mapped value for any railway noise where available.
Check my property near the A2 →
A2 noise: common questions
Why is the A2 median 20,200 when its ninetieth percentile is 121,200?
Because the road mixes lightly used stretches with a minority of very busy ones. Of 102 count points, 19 exceed a hundred thousand vehicles a day, yet half are at or below 20,200, and 4 are under ten thousand. The median describes the typical point, while the ninetieth percentile shows how heavy the busiest tenth is, which is why quoting either figure alone would mislead.
How many A2 count points exceed a hundred thousand vehicles a day?
Nineteen of the 102 points do, and 26 exceed fifty thousand. The maximum is 157,821, in the western third, which also has the highest median of the three sections at 38,300. The middle third still contains a reading of 128,850, so heavy flows are not confined to the western end alone, even though most of the road's count points sit at the lower end.
Is a 50 mph assumption right for the A2?
The indicative table assumes 50 mph, which matches the limit on the Rochester Way Relief Road through Kidbrooke and Eltham, opened in 1988. Other A2 sections will not necessarily share that speed, so the real figure at an address depends on the posted limit and on how traffic moves there, which is one reason the table is a baseline rather than an address result.
Will the Lower Thames Crossing change the A2?
It adds an A2 junction at Gravesend's eastern edge, with the A2 staying four lanes each way and rebuilt for about 2 miles east. The traffic counts used for the A2 are 2025 readings and predate any such change, so we cannot say whether flow near Gravesend would rise or fall, or how that would be felt at a given home.