You might think that 30mph was chosen using scientific evidence but you would be wrong....

Back in 1934, just prior to the introduction of the 30mph speed limit, there were only around one-tenth of the cars on the road today, but four times as many associated deaths.

There had previously been a blanket 20mph speed limit, set in the 1903 Motor Car Act, but it was repealed for light vehicles in 1930. The spate of deaths caused a change of heart in government in 1934 and 1935, with 30mph brought in for built-up areas.

You might think that 30mph was chosen using scientific evidence but you would be wrong....

"It was pulled out of a hat," says Rod King, founder of the 20's Plenty for Us campaign, which believes that the 30mph limit today is no longer appropriate, credible or acceptable.

"The 30mph limit is compromised beyond belief," says King. Cities including London, Manchester, Birmingham, Bristol, Bath, Cambridge, Liverpool, Oxford, Brighton, Newcastle and Edinburgh, have introduced 20mph limits on some roads in their jurisdiction. The Lib Dems have even considered 10mph limits in some areas.

While motoring organisations the RAC and the AA have expressed support for 20mph limits outside schools, they oppose a blanket change from 30 to 20.

Today there are three typical speed limits across the UK:

• a 30mph limit on roads with street lighting (which is taken to indicate a built-up area)
• a 60mph national speed limit on single carriageways
• and a 70mph top speed on dual carriageways and motorways

The limits are meant to keep everybody safe. The Department for Transport (DfT) says that for every 1mph the average speed of vehicles reduces on roads, there are 6% fewer accidents.
Speed limits should be "evidence-led and self-explaining", the DfT explains, and "should be seen by drivers as the maximum speed rather than as a target speed at which to drive irrespective of conditions". Road safety in the UK is relatively good, with one death on the roads for every 20,000 cars.

March of the 20mph camera enforced speed limits on busiest roads across Britain

Motorists face £100 fines as 20mph limits are imposed on some of Britain’s busiest roads.

Until now, the lower 20mph speed limit has been restricted to smaller roads in residential areas or near schools. However this is about to change with 20mph limits to be introduced on major arterial roads (policed by the latest digital speed cameras).

London Mayor Boris Johnson has revealed that eight pilot schemes will be run on ‘Red Routes’ – the main arterial roads that carry a third of the capital’s traffic. 

Other towns and cities including Bristol, Manchester, Birmingham, Edinburgh say they also intend to introduce the new limits.

The minimum fine fore motorists caught breaking the 20mph limit will be £100 fine and three points on their driving licence.

The AA says the new limits are being driven more by ‘dogma’ than road safety. A spokesman said: ‘These 20mph zones are popping up like spring daffodils.

‘There is a lot of fear among drivers that, with 20mph being a relatively unfamiliar speed, widespread speed camera use will make them look more at their speedometers than at what is happening on populated streets in front of them.’

If the trials in London ( due to last 18-months)  are judged a success, the 20mph limits will be made permanent and imposed on 30 miles of key ‘Red Routes’ considered by transport bosses to be ‘more local road than motorway’. Some 175 miles of residential streets.

Under the new London scheme, the first road to convert to 20mph next month will be Commercial Street in Shoreditch, linking into plans for Tower Hamlets and Hackney to become 20mph boroughs.

Rod King, founder of the ‘20’s Plenty for Us’ campaign group, said: ‘The current 30mph national limit is being rejected as “unfit for purpose” for communities so we’re setting out a series of government actions required for a planned transition to a UK default urban limit of 20mph by 2020.’

A Department for Transport spokesman said: ‘Research shows 20mph zones can save lives and this government has made it easier for councils to introduce them.

‘It is for local authorities to set speed limits and for the police to decide how best to enforce them.’

The spokesman added: ‘We are undertaking a three-year research project to better understand the effect of 20mph zones and their impact on local communities.’

Bristol mayor who fronted 20mph scheme is caught speeding

George Ferguson, the mayor of Bristol who spearheaded a £2.3m project to implement 20mph zones across his city has been caught speeding doing 35mph in a 30mph zone

Ferguson, who usually drives an electric-powered car or rides a bicycle, was behind the wheel of a Bristol city council fleet car at the time. He was clocked speeding on the A4 Portway road by Avon and Somerset police.

In a statement issued through the council, Ferguson described the offence as an inexcusable mistake and said he would be paying the £100 penalty charge.

“I am shocked to have just discovered I exceeded the speed limit on the Portway last month ... on one of the rare occasions when I have had to use a council fleet car.

“It serves as a sharp warning to me and goes to show that I am no exception to the rule. I am only too aware of the dangers of exceeding speed limits and commend the Avon and Somerset police for their vigilance.

“I have blemished an otherwise clean licence and shall be paying the penalty charge willingly from my own pocket.”

Ferguson became Bristol’s first directly elected major in 2012 and is an advocate of a 20mph pilot scheme run by the council.

The council voted in July 2012 to bring in the 20mph speed limit throughout Bristol in a six-phase scheme costing £2.3m. All roads except dual carriageways, 40mph and 50mph roads are considered for the 20mph speed limit, which applies to all motorised vehicles on the road.

Speaking at the time of the rollout, Ferguson said: “The new speed limit is part of a number of measures that we are introducing that will help to promote road safety, improve traffic flow, support sustainable transport and active travel and help to make Bristol a more positive place to live and work.

“We realise that the change in speed limit will take a little getting used to but I know from my own experience how little impact the reduction in speed will have on journey times.”

Case for 20mph Speed Limits Being Researched

The government has commissioned research into what the effects of cutting urban 30mph speed limits to 20mph would be. The research will be led by London University Professor Michael Maher and it is expected that it take three years to complete the research.

Robert Goodwill the Transport Minister said the research will examine the impact such a speed limit reduction on speed, collisions, casualties, modal shift [i.e. whether people switch from cars to other forms of transport]. The research will also consider air quality, best practice, road users' perceptions and effects on the quality of the environment, as well as relevant research from other countries. He also said that there were no plans to make 20mph the default speed limit, in reply to Green MP Caroline Lucas's question whether ministers had considered making 20mph the "national default speed limit".

In his written reply Mr Goodwill said: "Local authorities are best placed to determine the speed limits for their areas, based on local knowledge and the views of the community, and have the powers to do so."

Sources: BBC