Lowering Speed Limits

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The Mayor and Transport for London (TfL) is committed to Vision Zero, eliminating death and serious injury from London’s roads. The Vision Zero Action Plan sets out our ambition and next steps to achieve this. It details our plans to reduce road danger, including proposals to implement safer speeds on the roads we operate and manage across London.

What are we doing?

Our Vision Zero Action Plan sets out our aims to lower the speed limit by 10mph in selected locations, covering our roads in the central London area and over 140km of our roads across London. We have achieved and exceeded this target and to-date we have:

  • Introduced a 20mph speed limit on our roads in the central London Congestion Charging Zone in March 2020.
  • Reduced the speed limit by 10mph on over 200km of TfL roads across selected roads in 24 boroughs and in 37 town centres.

The Mayor has asked us to continue the programme as there are more locations where we can reduce speeds and therefore reduce collisions and casualties across London.

We will soon be entering Phase 3 of our Lowering Speed Limits programme. This phase involves reducing speed limits on roads on the Transport for London Road Network in nine more locations. These roads will be:

  • A1 Archway Road: Bakers Lane to Archway (Southwood Lane to Bakers Lane & Shepherds Hill to Hornsey Lane)
  • A312 Church Road: White Hart Roundabout to Western Avenue
  • A24 Stonecot Hill: Gander Green Lane to Sutton Common Road
  • A23 Thornton Road: Thornton Heath Pond to, and including Lombard roundabout
  • A10 The Roundway: Great Cambridge Road to Bruce Grove
  • A214 Trinity Road: Windmill Road to Aldrington Road
  • A316 corridor: Chalkers Corner to St Margarets roundabout (30mph)
  • A306 Roehampton Lane: Upper Richmond Road to Kingston Lane
  • A2213 Kidbrooke Park Road: Peglar Square to Eltham Road

We are committed to improving transport in London by making it safe and reliable. All of our plans have been designed with this in mind. Please view our Equalities Statement for more information.

Why do we want to lower speeds?

Collision data from around the world is very clear. It shows the faster a vehicle is travelling, the more likely a collision will occur because the driver has less time to react, stop or avoid the collision and the more severe an injury resulting from the collision will be.

We recently published a study which examines the impact of 20mph schemes and limits on borough roads in London. Our report – the first of its scale in London – comprehensively demonstrates that 20mph schemes have had a significant positive impact on reducing the number of people killed or seriously injured (KSI) on our roads. It shows that on borough roads where 20mph speed limits were introduced, there was a 34 per cent reduction in the number of people killed or seriously injured (from 395 to 260), compared against the background trend of a 15 per cent fall.

If you would like to know more background information about Lowering Speed Limits, please read our phase 1 consultation report.




The Mayor and Transport for London (TfL) is committed to Vision Zero, eliminating death and serious injury from London’s roads. The Vision Zero Action Plan sets out our ambition and next steps to achieve this. It details our plans to reduce road danger, including proposals to implement safer speeds on the roads we operate and manage across London.

What are we doing?

Our Vision Zero Action Plan sets out our aims to lower the speed limit by 10mph in selected locations, covering our roads in the central London area and over 140km of our roads across London. We have achieved and exceeded this target and to-date we have:

  • Introduced a 20mph speed limit on our roads in the central London Congestion Charging Zone in March 2020.
  • Reduced the speed limit by 10mph on over 200km of TfL roads across selected roads in 24 boroughs and in 37 town centres.

The Mayor has asked us to continue the programme as there are more locations where we can reduce speeds and therefore reduce collisions and casualties across London.

We will soon be entering Phase 3 of our Lowering Speed Limits programme. This phase involves reducing speed limits on roads on the Transport for London Road Network in nine more locations. These roads will be:

  • A1 Archway Road: Bakers Lane to Archway (Southwood Lane to Bakers Lane & Shepherds Hill to Hornsey Lane)
  • A312 Church Road: White Hart Roundabout to Western Avenue
  • A24 Stonecot Hill: Gander Green Lane to Sutton Common Road
  • A23 Thornton Road: Thornton Heath Pond to, and including Lombard roundabout
  • A10 The Roundway: Great Cambridge Road to Bruce Grove
  • A214 Trinity Road: Windmill Road to Aldrington Road
  • A316 corridor: Chalkers Corner to St Margarets roundabout (30mph)
  • A306 Roehampton Lane: Upper Richmond Road to Kingston Lane
  • A2213 Kidbrooke Park Road: Peglar Square to Eltham Road

We are committed to improving transport in London by making it safe and reliable. All of our plans have been designed with this in mind. Please view our Equalities Statement for more information.

Why do we want to lower speeds?

Collision data from around the world is very clear. It shows the faster a vehicle is travelling, the more likely a collision will occur because the driver has less time to react, stop or avoid the collision and the more severe an injury resulting from the collision will be.

We recently published a study which examines the impact of 20mph schemes and limits on borough roads in London. Our report – the first of its scale in London – comprehensively demonstrates that 20mph schemes have had a significant positive impact on reducing the number of people killed or seriously injured (KSI) on our roads. It shows that on borough roads where 20mph speed limits were introduced, there was a 34 per cent reduction in the number of people killed or seriously injured (from 395 to 260), compared against the background trend of a 15 per cent fall.

If you would like to know more background information about Lowering Speed Limits, please read our phase 1 consultation report.




Ask us about the programme

If you have any questions about the scheme, you can ask us here. We will then aim to get back to you.

Please note that any questions you ask may be visible to others and will be subject to moderation. Any personal information will be kept confidential but your user name will be displayed. Further details on moderation are available here and privacy here.

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  • Share I have just received the TFL letter confirming the change of speed limit from 30 to 20 mph being implemented from early 2026 on the A312 from the White Hart Roundabout to the Western Avenue, which I fully support. The letter states that "All existing speed safety camera's will have their enforcement thresholds lowered to reflect the new speed limit". My understanding is that there is only one speed camera on this road whicj is just North of the White Hart roundabout, but this is only used to enforce parking and red route violations on or near the access road for the shops nrar the White Hart. It is not currently used for speeding offences? Can you confirm whether this camera will now be used for enforcement, will further cameras be added on both carriageways of this dual carriageway road? The letter recieved does not refer to new cameras being added. Anyone who lives on this road or has to cross it from.nearby roads can tell you that when traffic volumes allow, vehicles currently often exceed the 30 mph limit. I cannot see why this will change unless it is properly enforced. Often in the early hours of the morning this road is used as a race track by people driving souped-up, extremely noisey cars going at far, far greater speeds. A new spped limit without enforcement will be largely pointless I fear. on Facebook Share I have just received the TFL letter confirming the change of speed limit from 30 to 20 mph being implemented from early 2026 on the A312 from the White Hart Roundabout to the Western Avenue, which I fully support. The letter states that "All existing speed safety camera's will have their enforcement thresholds lowered to reflect the new speed limit". My understanding is that there is only one speed camera on this road whicj is just North of the White Hart roundabout, but this is only used to enforce parking and red route violations on or near the access road for the shops nrar the White Hart. It is not currently used for speeding offences? Can you confirm whether this camera will now be used for enforcement, will further cameras be added on both carriageways of this dual carriageway road? The letter recieved does not refer to new cameras being added. Anyone who lives on this road or has to cross it from.nearby roads can tell you that when traffic volumes allow, vehicles currently often exceed the 30 mph limit. I cannot see why this will change unless it is properly enforced. Often in the early hours of the morning this road is used as a race track by people driving souped-up, extremely noisey cars going at far, far greater speeds. A new spped limit without enforcement will be largely pointless I fear. on Twitter Share I have just received the TFL letter confirming the change of speed limit from 30 to 20 mph being implemented from early 2026 on the A312 from the White Hart Roundabout to the Western Avenue, which I fully support. The letter states that "All existing speed safety camera's will have their enforcement thresholds lowered to reflect the new speed limit". My understanding is that there is only one speed camera on this road whicj is just North of the White Hart roundabout, but this is only used to enforce parking and red route violations on or near the access road for the shops nrar the White Hart. It is not currently used for speeding offences? Can you confirm whether this camera will now be used for enforcement, will further cameras be added on both carriageways of this dual carriageway road? The letter recieved does not refer to new cameras being added. Anyone who lives on this road or has to cross it from.nearby roads can tell you that when traffic volumes allow, vehicles currently often exceed the 30 mph limit. I cannot see why this will change unless it is properly enforced. Often in the early hours of the morning this road is used as a race track by people driving souped-up, extremely noisey cars going at far, far greater speeds. A new spped limit without enforcement will be largely pointless I fear. on Linkedin Email I have just received the TFL letter confirming the change of speed limit from 30 to 20 mph being implemented from early 2026 on the A312 from the White Hart Roundabout to the Western Avenue, which I fully support. The letter states that "All existing speed safety camera's will have their enforcement thresholds lowered to reflect the new speed limit". My understanding is that there is only one speed camera on this road whicj is just North of the White Hart roundabout, but this is only used to enforce parking and red route violations on or near the access road for the shops nrar the White Hart. It is not currently used for speeding offences? Can you confirm whether this camera will now be used for enforcement, will further cameras be added on both carriageways of this dual carriageway road? The letter recieved does not refer to new cameras being added. Anyone who lives on this road or has to cross it from.nearby roads can tell you that when traffic volumes allow, vehicles currently often exceed the 30 mph limit. I cannot see why this will change unless it is properly enforced. Often in the early hours of the morning this road is used as a race track by people driving souped-up, extremely noisey cars going at far, far greater speeds. A new spped limit without enforcement will be largely pointless I fear. link

    I have just received the TFL letter confirming the change of speed limit from 30 to 20 mph being implemented from early 2026 on the A312 from the White Hart Roundabout to the Western Avenue, which I fully support. The letter states that "All existing speed safety camera's will have their enforcement thresholds lowered to reflect the new speed limit". My understanding is that there is only one speed camera on this road whicj is just North of the White Hart roundabout, but this is only used to enforce parking and red route violations on or near the access road for the shops nrar the White Hart. It is not currently used for speeding offences? Can you confirm whether this camera will now be used for enforcement, will further cameras be added on both carriageways of this dual carriageway road? The letter recieved does not refer to new cameras being added. Anyone who lives on this road or has to cross it from.nearby roads can tell you that when traffic volumes allow, vehicles currently often exceed the 30 mph limit. I cannot see why this will change unless it is properly enforced. Often in the early hours of the morning this road is used as a race track by people driving souped-up, extremely noisey cars going at far, far greater speeds. A new spped limit without enforcement will be largely pointless I fear.

    Vaughany1 asked 14 days ago
    Thank you for your comments and your questions.

    We can confirm that there are no speed cameras within the scheme extents and that we are not planning to put any cameras in as part of the scheme. Apologies for the confusion this line in the letter caused.

    We are working with the Metropolitan Police Service (MPS) to increase their capacity to take enforcement action against drivers and riders who speed. The MPS enforced over 800,000 speed offences in 2024/25 to provide a more effective deterrent to speeding. This was delivered through a combination of on-street police enforcement, our extensive safety camera network and mobile safety cameras introduced last year. 

    Our policing partners always find first hand intelligence useful. This type of offence can be tricky as the police have to witness it to enforce it and when the police are onsite, people are more likely to be compliant. Motorists or witnesses should report any criminal issues to the police via the Metropolitan Police website https://www.met.police.uk/ro/report/rti/rti-beta-2.1/report-a-road-traffic-incident/, or by visiting a police station. As much evidence and detail as possible should be provided as this could help lead to a successful prosecution. The police will also use this data to build on intelligence and inform tasking and deployment of police officers.

    Finally, in our Vision Zero Action Plan, we committed to expanding London’s safety camera network as part of efforts to reduce speed and speed-related collisions in the capital. We are undertaking the essential preparatory work for this and ensuring we have all the necessary elements in place before rolling out new camera sites. This includes implementation of offence processing technology, recruitment of enforcement staff, and exploring new camera technology to ensure that we are investing in the best and most cost-effective systems for the future. Once we are in a position to expand the network, we will prioritise locations for safety cameras, using a methodology developed in consultation with boroughs and London Councils. 
  • Share The A1 Archway Road is six lanes wide and was built for high speeds and high traffic volumes. It definitely doesn't need to be the width it is and you're now lowering the speed limit. What will be done to redesign the road to make it more appropriate for the lower speed? Will there be more trees and cycle lanes? Will there be more enforcement? Just painting new speed limits on the road isn't enough to transform the area or driver behaviour. on Facebook Share The A1 Archway Road is six lanes wide and was built for high speeds and high traffic volumes. It definitely doesn't need to be the width it is and you're now lowering the speed limit. What will be done to redesign the road to make it more appropriate for the lower speed? Will there be more trees and cycle lanes? Will there be more enforcement? Just painting new speed limits on the road isn't enough to transform the area or driver behaviour. on Twitter Share The A1 Archway Road is six lanes wide and was built for high speeds and high traffic volumes. It definitely doesn't need to be the width it is and you're now lowering the speed limit. What will be done to redesign the road to make it more appropriate for the lower speed? Will there be more trees and cycle lanes? Will there be more enforcement? Just painting new speed limits on the road isn't enough to transform the area or driver behaviour. on Linkedin Email The A1 Archway Road is six lanes wide and was built for high speeds and high traffic volumes. It definitely doesn't need to be the width it is and you're now lowering the speed limit. What will be done to redesign the road to make it more appropriate for the lower speed? Will there be more trees and cycle lanes? Will there be more enforcement? Just painting new speed limits on the road isn't enough to transform the area or driver behaviour. link

    The A1 Archway Road is six lanes wide and was built for high speeds and high traffic volumes. It definitely doesn't need to be the width it is and you're now lowering the speed limit. What will be done to redesign the road to make it more appropriate for the lower speed? Will there be more trees and cycle lanes? Will there be more enforcement? Just painting new speed limits on the road isn't enough to transform the area or driver behaviour.

    North Islington asked 12 days ago
    Thank you for your comments.

    We are taking a two-stage approach to implementing this scheme. The first stage will introduce the changes, using signs and lines. We will then monitor the effectiveness of these changes to identify whether any further changes are required.
  • Share What is 20mph in km/h? on Facebook Share What is 20mph in km/h? on Twitter Share What is 20mph in km/h? on Linkedin Email What is 20mph in km/h? link

    What is 20mph in km/h?

    saqitexu asked 14 days ago

    20 mph is equivalent to approximately 32km/h

  • Share Isn't this just about raising more money through speeding tickets? on Facebook Share Isn't this just about raising more money through speeding tickets? on Twitter Share Isn't this just about raising more money through speeding tickets? on Linkedin Email Isn't this just about raising more money through speeding tickets? link

    Isn't this just about raising more money through speeding tickets?

    R THORNTON asked over 1 year ago

    Thank you for your query. 

    Revenue raised through speed enforcement, from Fixed Penalty Notices and court fines, goes directly to HM Treasury.

  • Share Hi, from what date will the new 30mph speed limit in St Helier Avenue (Merton) be enforced? on Facebook Share Hi, from what date will the new 30mph speed limit in St Helier Avenue (Merton) be enforced? on Twitter Share Hi, from what date will the new 30mph speed limit in St Helier Avenue (Merton) be enforced? on Linkedin Email Hi, from what date will the new 30mph speed limit in St Helier Avenue (Merton) be enforced? link

    Hi, from what date will the new 30mph speed limit in St Helier Avenue (Merton) be enforced?

    FulhamFox asked over 1 year ago

    Enforcement of the new 30mph speed limit along St Helier Avenue will come into operation on 18th March 2024

Page last updated: 16 Jul 2025, 05:33 PM