Road & rail noise map for Trowbridge
Town in Wiltshire, South West
We analysed 1,341 postcodes in and around Trowbridge, Wiltshire against DEFRA's Strategic Noise Mapping (Round 4, 2022). 26% of them (345) have mapped road noise of 55 dB or more by day, and <1% have mapped rail noise. 74% 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 BA14 6DX (road noise 70.0–74.9 dB by day).
Noise map of Trowbridge
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 | 17% (232) | 6% (83) |
| 60.0–64.9 dB day · 55.0–59.9 dB night | 6% (86) | 4% (56) |
| 65.0–69.9 dB day · 60.0–64.9 dB night | 2% (26) | 1% (20) |
| 70.0–74.9 dB day · 65.0–69.9 dB night | <1% (1) | <1% (2) |
| 75.0 dB or more day · 70.0 dB or more night | 0% (0) | 0% (0) |
| Below mapped bands / not mapped | 74% | 88% |
Rail noise
| Band | Day (LAeq,16h) | Night (Lnight) |
|---|---|---|
| 55.0–59.9 dB day · 50.0–54.9 dB night | <1% (3) | <1% (5) |
| 60.0–64.9 dB day · 55.0–59.9 dB night | <1% (1) | <1% (1) |
| 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 | 100% | 100% |
Share of the 1,341 postcodes within ~5 km of the Trowbridge centre. Source: DEFRA Strategic Noise Mapping Round 4 (2022), Open Government Licence.
Noisiest postcodes in and around Trowbridge
Check a specific postcode
Example searches: BA14 6DX · BA14 0EE · BA14 0BN · BA14 0DG · BA14 0DF · BA14 0EA
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 Trowbridge?
- We analysed 1,341 postcodes in and around Trowbridge, Wiltshire against DEFRA's Strategic Noise Mapping (Round 4, 2022). 26% of them (345) have mapped road noise of 55 dB or more by day, and <1% have mapped rail noise. 74% 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 BA14 6DX (road noise 70.0–74.9 dB by day).
- Where is the most road noise in Trowbridge?
- The postcodes with the highest modelled daytime levels in and around Trowbridge are BA14 6DX, BA14 6AP, BA14 8HR, based on DEFRA's 2022 model of major roads and railways.