 Clean Air Zone traffic sign symbol | |
| Location | See§ List of Clean Air Zones |
|---|---|
| Launched | 5 March 2021 (in Bath)[1] |
AClean Air Zone (CAZ) is an area in the United Kingdom where targeted action is taken to improveair quality.[2] A CAZ can be non-charging or charging.[citation needed]
Whether a vehicle is charged when entering or moving through a CAZ depends on the type of vehicle and theEuro standard of the vehicle. The amount charged is up to the local authority responsible for the CAZ.Ultra-low-emission vehicles are not charged when entering or moving through a Clean Air Zone.
| Class | Vehicle | Euro Category | Charge applies to vehicles below this Euro standard |
|---|---|---|---|
 |  Bus[a] Coach[a] | M3 | Euro VI |
 Taxi and private hire | M2, M1 | Euro 6 (diesel) Euro 4 (petrol) | |
 | Bus[a] Coach[a] | M3 | Euro VI |
 Heavy goods vehicle (HGV)[b] | N2, N3 | ||
| Taxi and private hire | M2, M1 | Euro 6 (diesel) Euro 4 (petrol) | |
 | Bus[a] Coach[a] | M3 | Euro VI |
| Heavy goods vehicle (HGV)[b] | N2, N3 | ||
| Taxi and private hire | M2, M1 | Euro 6 (diesel) Euro 4 (petrol) | |
 Minibus[c] | M2 | ||
 Light goods vehicle (LGV)[d] | N1 | ||
 | Bus[a] Coach[a] | M3 | Euro VI |
| Heavy goods vehicle (HGV)[b] | N2,N3 | ||
| Minibus[c] | M2 | Euro 6 (diesel) Euro 4 (petrol) | |
| Light goods vehicle (LGV)[d] | N1 | ||
| Taxi and private hire | M1 | ||
 Private cars | |||
 Motorcycles (optional) Mopeds (optional) | N/a | Euro 3 |
| Region | Type | Date of implementation | Scope | Notes | References |
|---|---|---|---|---|---|
| Bath | Class C | 15 March 2021[1] | A wide central area | Reducednitrogen dioxide levels by 26% in 2022/2023, meeting legal standards. | [3][4] |
| Birmingham | Class D | 1 June 2021 | All the roads within but not including theA4540 Ring Road | [5][6] | |
| Bradford | Class C+ | September 2022 | The area inside and including the Bradford outer ring road, extending to Shipley and Saltaire. | [7] | |
| Bristol | Class D | 28 November 2022 | A wide central area extending the North Somerset boundary, including the main route between Wales and Bristol Airport. | Originally planned as class B with additional diesel vehicle ban in parts of city centre between 07:00 and 15:00. Changed to class D due to government rejection. | [8][9] |
| Derby | Non-charging | 2020 | Traffic management measures on Stafford Street | [10] | |
| Newcastle | Class C | July 2022 | City centre, including bridges over theRiver Tyne and bridge approaches across the river inGateshead | [11] | |
| Nottingham | Non-charging | 2020 | Retrofitting buses, regulating taxis, converting council-owned vehicles | [12] | |
| Portsmouth | Class B | 29 November 2021 | City centre area excluding port and naval base | [13] | |
| Sheffield | Class C | 27 February 2023 | Inner ring road and thecity centre | [14] | |
| Southampton | Non-charging | 2020 | Retrofitting buses, regulating taxis, cleaner fuels and equipment at Southampton's port,cycling infrastructure | [15] |
| Region | Type | Scope | Notes | References |
|---|---|---|---|---|
| Greater Manchester | Class B | All local roads in the county | Taxis and private hire vehicles registered within county exempt for first 12 months. Under review. | [16][17][18] |
| Leeds | Class B | City centre | All roads within the boundary of the A61 and A63. Plans postponed in 2020 due toCOVID-19 pandemic in England. | [19][20] |
| Leicester | Class A | Plans scrapped. | [21] |
| Region | Type | Start date | Scope | Notes/references |
|---|---|---|---|---|
| London | LEZ | 2008 | CoversHGVs and buses around the Greater London area | |
| London | ULEZ | 2019 (expanded in 2021 and 2023)[e] | Covers all other vehicles in the same area as the LEZ | |
| Oxford | ZEZ | 2022 | Covers all non-electric vehicles in the city centre. Operational 07:00 to 19:00 including Sundays | [f] |
| Glasgow | LEZ | 2018 (expanded to cars in 2023) | Covers the city centre | [g] |
