Road & rail noise map for Swanley
Town in Kent, South East
We analysed 1,707 postcodes in and around Swanley, Kent against DEFRA's Strategic Noise Mapping (Round 4, 2022). 30% of them (505) have mapped road noise of 55 dB or more by day, and <1% have mapped rail noise. 70% of postcodes have no mapped road or rail noise at all — though that reflects major-source modelling, not guaranteed quiet. The highest modelled level we found is at DA14 6JR (road noise 70.0–74.9 dB by day).
Noise map of Swanley
How many postcodes are affected?
Road noise
| Band | Day (LAeq,16h) | Night (Lnight) |
|---|---|---|
| 55.0–59.9 dB day · 50.0–54.9 dB night | 16% (272) | 8% (140) |
| 60.0–64.9 dB day · 55.0–59.9 dB night | 11% (188) | 7% (117) |
| 65.0–69.9 dB day · 60.0–64.9 dB night | 2% (39) | 1% (20) |
| 70.0–74.9 dB day · 65.0–69.9 dB night | <1% (6) | <1% (4) |
| 75.0 dB or more day · 70.0 dB or more night | 0% (0) | 0% (0) |
| Below mapped bands / not mapped | 70% | 84% |
Rail noise
| Band | Day (LAeq,16h) | Night (Lnight) |
|---|---|---|
| 55.0–59.9 dB day · 50.0–54.9 dB night | <1% (6) | <1% (8) |
| 60.0–64.9 dB day · 55.0–59.9 dB night | <1% (4) | <1% (2) |
| 65.0–69.9 dB day · 60.0–64.9 dB night | 0% (0) | 0% (0) |
| 70.0–74.9 dB day · 65.0–69.9 dB night | 0% (0) | 0% (0) |
| 75.0 dB or more day · 70.0 dB or more night | 0% (0) | 0% (0) |
| Below mapped bands / not mapped | 99% | 99% |
Share of the 1,707 postcodes within ~5 km of the Swanley centre. Source: DEFRA Strategic Noise Mapping Round 4 (2022), Open Government Licence.
Noisiest postcodes in and around Swanley
Check a specific postcode
Example searches: BR8 8TS · DA14 5JA · BR6 0JB · BR8 8TJ · DA14 5AP · DA14 6JR
What this data does — and doesn't — cover
- Modelled, not measured.These are DEFRA's computer-modelled estimates (Round 4, 2022), not microphone readings at your door.
- Major sources only. The model covers major roads, major railways and large urban areas. Smaller local roads, neighbours, pubs, building sites and aircraft are not included.
- No mapped noise ≠ quiet. If a location shows no band, it means it falls outside the mapped contours — not that it is silent.
- 2022 snapshot.New roads, developments or traffic changes since 2022 won't show. The next DEFRA round is due around 2027.
More detail on the methodology page.
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Nearby areas
Frequently asked questions
- How noisy is Swanley?
- We analysed 1,707 postcodes in and around Swanley, Kent against DEFRA's Strategic Noise Mapping (Round 4, 2022). 30% of them (505) have mapped road noise of 55 dB or more by day, and <1% have mapped rail noise. 70% of postcodes have no mapped road or rail noise at all — though that reflects major-source modelling, not guaranteed quiet. The highest modelled level we found is at DA14 6JR (road noise 70.0–74.9 dB by day).
- Where is the most road noise in Swanley?
- The postcodes with the highest modelled daytime levels in and around Swanley are DA14 6JR, BR6 0JB, DA14 5JA, based on DEFRA's 2022 model of major roads and railways.