Trial Traffic Filters
Reducing Traffic in the City
A traffic filter is a camera-enforced point on a road where certain types of traffic aren't allowed through at certain times. The six trial traffic filters in Oxford will only restrict cars. All other vehicles can travel through them at any time without a permit.
The traffic filters will be at the same points on six roads in Oxford as the current temporary congestion charge locations.
View a map of locations and permit areas.
The traffic filter trial is designed to further reduce congestion in the city, creating a healthier, more accessible and attractive Oxford. By removing the option for car drivers to pay, it aims to further reduce through-traffic and encourage more people to take public transport or walk, cycle and wheel.
Traffic filters are part of the central Oxfordshire travel plan and Oxfordshire's local transport and connectivity plan.
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Marston Ferry Road and Hollow Way - Monday to Saturday - At peak times between 7am to 9am and 3pm to 6pm
Hythe Bridge Street, St Cross Road, St Clement’s Street and Thames Street - Monday to Sunday - 7am to 7pm
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The scheme only applies to cars. All other vehicles are exempt. For those where car use is essential, there are 20 different types of permits e.g. for carers and community health and care workers, making travel around the city easier for these groups. Find out more about permits and eligibility here. https://www.oxfordshire.gov.uk/transport-and-travel/oxford-traffic-filters/exemptions-and-permits
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Permit applications are available to apply for online
Residents in the Oxford permit area are eligible for 100 day passes per year, while residents in the Oxfordshire permit area are eligible for 25 day passes per year.
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How the Process Works
Detection: Automatic Number Plate Recognition (ANPR) cameras enforce the filter points 24/7. When a vehicle passes through, the camera scans its registration plate and checks it against the council's permit system.
Verification: If no valid permit or exemption is attached to the registration number, the system pulls the registered keeper's details from the DVLA database.
Delivery: A formal Penalty Charge Notice (PCN) (or a warning notice) is posted to the vehicle owner.
What You Will Receive
Warning Notice (First Offence during the trial): During the first 6 months of the traffic filter trial, the council issues a Warning Notice instead of a fine the first time a vehicle triggers a filter. This serves as an alert without requiring payment.
Penalty Charge Notice (PCN): For subsequent breaches (or after the initial trial warning period), you will receive a formal PCN demanding payment.
The Details
Benefits of Traffic Filters
Faster Bus Travel: Speeds up public transit by removing heavy car queues from key corridors, making bus routes more reliable and encouraging public transit use.
Safer Streets: Creates safer, more attractive environments for walking and cycling across the city.
Lower Emissions: Reduces local air pollution and helps tackle climate change by cutting down unnecessary urban car trips.
Better Health: Promotes active, outdoor travel options which improve the overall wellbeing of residents and visitors.
Updated August 2026