Charges have now come into force for drivers entering Birmingham's Clean Air Zone (CAZ).
The zone was officially launched on 1 June, but there was a two-week grace period before charges applied to give motorists "time to adjust”.
No charges or fines have been imposed for the first fortnight after the original launch date of June 1, the Birmingham Mail reports.
From 00:00 BST on Monday 14 June, cars, taxis and vans that do not meet Clean Air Zone emission standards will be charged £8 a day, and non-compliant coaches, buses and lorries will be charged £50 per day.
In charging terms, a day is classified as any midnight to midnight period, not 24 hours from when you enter the zone. During that timeframe, you can enter and leave the zone as many times as you like and only pay once.
The zone is enforced using Automatic Number Plate Recognition (ANPR).
Payments can be paid online using the Government's payment system at: https://multiple-vehiclecheck-pay.drive-clean-air-zone.service.gov.uk or over the phone by calling 0300 029 8888 (Monday to Friday, 8am to 4.30pm).
You can also use the online Government’s vehicle checker to see if you will need to pay a charge for a vehicle: https://vehiclecheck.drive-clean-air-zone.service.gov.uk/vehicle_checkers/enter_details
For more information about Clean Air Zones, visit: https://www.gov.uk/guidance/driving-in-a-clean-air-zone