If only we could take 3 countries with the same cars, laws, etc, change most 30mph speed limits to 20mph in one of them and measure the results. Wales did that and now a Senedd Research report has shown how casualties dropped, -23.8% compared to England -5.2% and Scotland +3.1%. #20splenty
New Transport for London Speed Limit map just out. Shows huge coverage of 20mph limits (in green).
NB 69% of road casualties in London are on main roads ("A"/"B" classified) so great to see TfL and many boroughs bringing in 20mph on these roads too.
Open the app to drill down
Latest Senedd Research report has shown that road casualties in Wales dropped significantly after implementing the default 20mph limit when compared to England and Scotland. Another reason to say #20splenty where people are.
Moray Council has identified approximately 260 miles of the local road network – primarily in built-up areas – to be reduced from 30mph to 20mph. Another Scottish Council adopting a Safe System approach to speed management in cities, towns and villages.
Opinion of 20mph limits within the transport and road safety sector has shifted to a majority favour of 20mph as a "Safe System" urban/village norm in the last 5 years. Data across 20-30% casualty reduction, insurance reduction and minimal journey delays have tipped the balance. #20splenty
It's another huge benefit for pedestrians from 20mph in Wales as legislation passed today enables councils to install simplified side zebra crossings at junctions where the main and side roads have a 20mph limit.
Good to see another 3,690 20mph roads coming to Glasgow as Scotland aligns its urban/village speed limits with global best practice. www.glasgow.gov.uk/article/8943...
The government's new Road Safety Strategy targets a 65% reduction in all KSIs and a 70% reduction in child KSIs over next 10 years.
In GB 50% of all KSIs and 64% of child KSIs are on 30mph roads.
Welsh 20mph/30mph casualties fell by 26% and KSIs by 15% after setting a default 20mph limit.
Yet another report shows that taking a Safe System approach to Road Safety mandates a default 30km/h (20mph) limit. With the UK Road Safety Strategy adopting the Safe System approach then a default urban/village 20mph limit is inevitable. road-safety.transport.ec.europa.eu/document/dow...
If you commit to a Safe System approach in your Road Safety Strategy then implicit in that are survivable speed limits where motors mix with people on urban/village roads. And that means 20mph except for where higher limits can be evidentially justified as safe. www.20splenty.org/guidance_2026
In announcing the UKGov's Road Safety Strategy the English guidance on setting local speed becomes obsolete to be replaced with one based on a Safe System approach. This already exists as the Scottish criteria for 20mph as an urban/village norm as follows. See www.20splenty.org/guidance_2026
It's good to see that the Welsh media are recognising that all the evidence shows that 20mph limits have significantly reduced death and injury on urban/village roads.
“Helsinki hasn’t registered a single traffic-related fatality in the past year…Citing data that shows the risk of pedestrian fatality is cut in half by reducing a car’s speed from 40 to 30km/hr, city officials imposed the lower limit in most of Helsinki’s residential areas and city center in 2021.”
Can councils afford the waste from maintaining 30mph limits where people mix with motors? The data tells us that keeping 30mph maintains casualties 33% higher than if they were changed to 20mph. It also keeps insurance premiums higher, suppresses active travel and wastes A&E resources. #20splenty
The evidence from the 2 years since Wales set a 20mph default for urban/village roads is clear:-
1,270 fewer casualties
134 fewer of them being fatal or serious
£45 pa lower insurance premiums than without 20
These are big wins for communities, NHS, emergency services and economy.
𝗪𝗲𝗹𝗹 𝗱𝗼𝗻𝗲 𝗪𝗮𝗹𝗲𝘀
Its good to see roads in Bishop's Stortford being set to 20mph as Hertfordshire Council embraces wide-area 20mph limits to deliver better, safer, friendlier and healthier community streets.
Happy Valentine's Day to all the people who are making their communities better places for loved ones to walk, cycle, live, learn, work, shop and drive by setting 20mph limits.
Plans being developed by Hertfordshire County Council suggest that more than half of the county’s urban roads could be operating under 20mph speed limits within the next two years.
It's good to see that speed limits are being cut on 34 Stoke-on-Trent streets - from Monday. Stoke-on-Trent City Council is bringing in a 20mph zone across most Penkhull streets.
This afternoon 5/2/26, MPs are debating Road Safety. Wales won a 25% reduction in casualties from its national 20mph limit, so please forward this to your MP for discussion. Transport professionals say why it needs a national policy in England, just like Wales or Scotland. See how in the comments.
As more towns say #20splenty, it's time the UK Gov ended the postcode lottery on 20mph limits and dumped the national 30mph limit. Its been rejected by most local authorities. Hear what these transportation professionals are saying about setting 20mph nationally or locally. vimeo.com/1160185854?f...
Its good to see more of the busy roads controlled by TfL being set at 20mph in London. These are where the greatest motor/people interactions take place and have the biggest potential to lower speeds and casualties for drivers and people outside of cars.
haveyoursay.tfl.gov.uk/lowering-spe...
Whilst accepting that the Road Safety Strategy is a marathon rather than a sprint, Wales and Scotland are already a sixth of the way towards meeting the 65% reduction in KSIs with their national 20mph policies, Northern Ireland will make progress with its newly announced GDL policy. England?
See first comment: why the previous “Setting Local Speed Limits” guidance is no longer relevant or fit for purpose, and how English highway authorities could adopt the Safe System approach to urban/village speed limits.
Anine Hartmann @aninehartmann.bsky.social ⋅ 17d
