Founder & Campaign Director, 20's Plenty for Us

Rod King 81sc

Rod King

Rod King's activity stream

  • published More Council Myths in Briefing Sheets 2017-10-29 18:24:04 +0000

    More 20mph Council Myths

    Councillors and council officers don’t always tell the truth on 20mph limits. Here we bust some more of the common myths. See also part 1 about A and B roads, current average speeds over 24mph, unsupportive police and collision history.

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  • commented on Get your info 2017-10-06 12:04:16 +0100
    Hi Carolyn


    I have approached Professor Strauss regarding access to the paper.


  • commented on NICE Recommends 20mph limits Without Traffic Calming to Improve Air Quality 2017-07-29 18:48:43 +0100
    The most important thing is to be consistent. If you do something in only one place to physically reduce speeds then at the same time you are communicating that elsewhere you can and should go faster. Engineering is fine if you can do it throughout the whole network of community roads. But is the affordable or practical? Other routes to gain compliance can be engagement, enforcement. Society has a choice, carry on curbing walking and cycling from fear of traffic danger or subject non-compliers to the rule of law. Its not difficult, simply needs commitment to supporting communities and the levers to better public health, air quality, child and elderly mobility, etc.

  • commented on IAM are not so RoadSmart in their interpretation of the latest DFT report on speed limit compliance on 20mph roads 2017-07-03 18:34:04 +0100
    Other observations from the DfT report are that even on these roads with few visual clues as to the presence of people :-

    1) On 20mph roads, 37% are exceeding the limit by less than 5 mph, which is not too bad
    2) On 20mph roads, 15% are exceeding 30mph
    3) On 30mph roads, 53% of cars are exceeding the 30mph (and 25% are going more than 35mph)
    4) That means that roads with a 20mph limit have 38% FEWER cars going over 30mph!

    Or to put it even more simply, while more than half of motorists exceed 30 mph on a 30 mph road, only 15% do on (even atypical, non residential) 20 mph roads, making them substantially safer for people walking or cycling.

    P.S. If over half of all motorists are speeding on 30 mph roads does IAM conclude they’re causing confusion too?

  • commented on 20's Plenty for London Update - Sep 16 2017-05-31 19:12:02 +0100
    Dear James

    Many thanks for your comments. We know from British Social Attitude Surveys that about 70% of people are in favour of 20mph limits for residential roads and busy streets. At the same time about 10% oppose. So I guess you are one of the 10%!

    Yes, roads really are safer, and if you were to replace all the people using bicycles in Westminster with cars then it really would be far more congested.

    And places which provide streets and roads which can be used by all rather than just those in cars are actually more economically successful than those with 20th century ideas of the car being king and used to displace other forms of transport.

  • commented on Lessons to learn from Manchester 2017-07-31 21:46:13 +0100
    Hi Vanessa
    Our response is that driving more calmly and eliminating acceleration to 30mph will have a very positive effect on air quality. See our press releases




  • commented on Manchester Found Casualties Falling in its 20mph Areas 2017-03-11 13:02:41 +0000
    Hi Gina

    When you put in wide-area 20mph limits you include many roads where the average speeds are already low. You do this for consistency and because it would be ridiculous to maintain a 30 limit on such roads when “faster” roads had a 20 limit. Reductions tend to be proportional to the previous average, with higher ave speed roads achieving the highest reductions. Hence the inclusion of low speeds roads where you will see minimal or zero reduction tends to dilute the overall average reduction.

    On most 20mph wide-area implementations you get approx 1-2mph overall average reduction in speed. But this is skewed with faster roads achieving up to 6mph reduction. Whilst this is quite different from an isolated and physically calmed scheme, such schemes only reduces speed on that small section of road and endorses 30mph on the rest of the road network. You can see our comparison at

    You are correct in considering that authority-wide 20mph limits are far more about setting a social consensus rather than traffic management. The crude sort of analysis conducted by Manchester City Council makes no allowance for this and is critically flawed. See my blog on this at

  • commented on A Call for Safety Camera Enforcement of 20mph limits 2017-01-06 10:45:17 +0000
    Thanks for your comment Peter. I would suggest that a more appropriate comment would be “Yes obviously increasing speed makes the impact worse, saying speed is a feature in all crashes is like saying the height is a feature in all fall from height incidents.”

    All limits are flouted, but what that same DFT report, which only measured free-flowing roads, noted was that speeds on 20mph limits were 6mph lower than those on 30mph roads for all classes of traffic. Note that the report only included a total of 9 20mph sites across the whole country.

  • 20mph cuts air and noise pollution to prevent blighted lives

    20mph limits massively cut toxic diesel emissions. 40,000 die early pa[1] from outdoor fumes – 23 times more than in crashes[2]. 20mph is equivalent to taking over half the petrol cars off the road. Traffic noise also blights lives. 20mph halves perceived noise compared to 30mph. We can’t see pollution, yet it affects our physical and mental health. Demand 20mph today!

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  • Isle of Wight Full Council Vote For 20mph limits

    20mph limits have been voted on at Full Council on the Isle of Wight. The 20mph vote was won on Wednesday 19th October.  80% of Councillors supported 20mph for built up areas. Councillor Julie Jones-Evans’ motion called for 20mph limits for “'residential streets, town and village centres, and where people work and learn.”  

    Open PDF

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  • published WHO say 20's Plenty in Press Releases 2016-10-15 09:26:49 +0100

    World Health Organisation say 20's Plenty

    The World Health Organisation’s (WHO) new Pedestrian Safety report endorses area-wide lower speed limits.  It is top level, conclusive proof that signed 20mph limits are effective.  

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  • published Scottish 20mph Default Moves Closer in Press Releases 2016-06-09 10:34:27 +0100

    Scottish 20mph Default Moves Closer

    The first Scottish 20mph Conference moved the debate forward on a National 20mph limit.  20mph was clearly popular amongst delegates from many Traffic Authorities with 95% “favouring a national default limit of 20mph”. Conference-goers agreed 20’s Plenty. The Scottish Government can lead on a 20mph default for built up areas as this is the best value for money in raising everyday road safety and liveability.  

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  • published 20mph As Scotland’s National Limit in Press Releases 2016-06-06 12:40:48 +0100

    20mph As Scotland’s National Limit

    People want 20mph streets.  Fortunately 20mph limits are affordable and do-able. What’s the best method? The Scottish Government can lead with a 20mph default for built up areas.  This is a cost effective win-win all round – eg for the legal process, consultation, signage, engagement, higher compliance and enforcement.

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  • commented on 30km/h 2018-08-08 09:20:11 +0100
    Great to hear that the City of Yarra in Melbourne is trialling 30km/h limits see

  • published 20's Plenty for Manchester - Progress so far in Case Studies 2016-04-24 20:13:25 +0100

    20's Plenty for Manchester - Progress so far

    In February 2012 Labour-controlled Manchester unanimously passed a 20mph motion (proposed by a Lib Dem). In March 2012  the Council Executive agreed to investigate funding for 20mph on all C and Unclassified roads. Estimated cost £2.8m (Total 20) or £41m (with calming). In May 2013 the Executive agreed £500,000 from public health funds to improve road safety. Three areas were prioritised for Phase 1 covering 16% of the network.

    Area 1 – Gorton (Collision Hotspot, Social Deprivation, High Population Density)

              Area 2 – Miles Platting, Newton Heath, Ancoats and Clayton  (Social Deprivation, high degree of community engagement)

              Area 3 – Hulme, Moss Side and Fallowfield (Maximise benefits of the complementary Bus Priority Scheme on the Oxford Road Corridor)

    In February 2014 Traffic Regulation Orders published. Strap line 20 is Enough logo with smiley face featured on banners from school railings. Roadpeace, Key 103 Radio and student volunteers engaged - with access to £200 grants.

    In March 2014 councillors, police, schoolchildren and campaigners gathered at Clayton Park for official launch.

    In Spring 2016 the Velocity Project funded by Cycle City Ambition Grant created series of Cycle Super Highways, some on main arterials - where speed limit remains 30mph. Most of adjacent network became 20mph. £500,000 pays for implementation - again from Public Health monies.

    Much of the 20mph rollout has been allied to other transport projects improving public transport or cycling facilities funded by public health budgets. It is uncertain how much of the network is 20 mph (16- 46%). Funding is uncertain and the council "plan traffic surveys before and after the introduction of the limits to monitor results before considering whether to extend it".   "Enforcement is targeted at locations where there has been serious or fatal road accidents"  said police.

    The 20mph Champion is currently Cllr Ollie Manco. Key supporters include the Executive Member for the Environment, Cllr Kate Chappell and Transport for Greater Manchester Cycling Champion Cllr Chris Paul.

    Traffic congestion is threatening economic growth. Lower speeds are seen as key element in  encouraging modal shift away from car use towards public transport, cycling and walking.

    In May 2017 electors from ten local authorities will vote for the first Greater Manchester Mayor with police and transport responsibilities.

    Vincent Walsh, 20's Plenty for Manchester, 20 April 2016

  • commented on Cardiff to set 20mph limits across the city 2016-04-12 16:36:35 +0100
    HI Nic

    We would be delighted to help and will make contact by email.


  • One year zone 30 in Ghent city center: rate drops and fewer accidents

    We noticed this report on the success of the new Zone 30 in the Belgian city of Ghent. It may be viewed here but the English translation of the web page follows.

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  • published Case Studies in Get your info 2016-03-13 15:57:44 +0000

  • published Ready for 20 Presentation in Blog 2016-02-26 15:23:04 +0000

    Ready for 20 Presentation

    At the 7th annual 20mph Places conference in Guildhall, City of London, after a warm welcome from Cllr Michael Welbank MBE, I made my presentation on how 20's Plenty/Love 30 is a developing standard for streets. Here is the text of that presentation.

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