In the wake of Manchester City Council’s decision to review its 20mph scheme, the campaign group 20’s Plenty for Us has published what it is calling the ‘lessons to be learnt’ from the episode.
A recently published evaluation of 20mph zones in Manchester recommended that the City Council should for the time being focus on alternative road safety schemes because the zones have had little positive effect on speed, collisions and casualties.
It its briefing, 20’s Plenty for Us says the roads selected for the 20mph scheme are ‘atypical of the aggregate of Manchester roads’, and that enforcement of the scheme has been ‘almost non-existent’. It also says the casualty numbers quoted are ‘not statistically significant’, and that the 20mph roll out in Manchester ‘has been far too slow and not shown the necessary commitment and vision’.
The 20’s Plenty of Us briefing says: “Some of the media and 20mph opponents have used this as ‘proof’ that 20mph limits ‘don’t work’ and are calling for other cities to ‘learn from Manchester’ and change their 20mph plans.
“At 20’s Plenty we take the view that all evidence is useful evidence but needs to be put into context to understand how relevant it is.
“In the case of the statistics quoted by Manchester there is considerable doubt as to whether they can tell us anything positive or negative, but may point to things which Manchester needs to do better in its 20mph roll out.
“The report admits that the data is flawed and inconclusive. The report actually says ‘we would need to evaluate data over a longer time to get data that is more statistically relevant’. Indeed taking a similar broad-brush approach without appropriate consideration of the detail could be considered careless.
“We are pleased that Manchester City Council is continuing its 20mph Phase 2 roll-out, however we believe that it has made a mistake in questioning the value of 20mph limits.
“Whilst there may be much for others to learn, it is probably more about how Manchester can implement 20mph limits more effectively rather than whether they should be doing it at all.”
Click here to read the full 20’s Plenty for Us briefing.
Report recommends pause on Manchester’s 20mph scheme
09 March 2017