Wales becomes Trumpton

[IT Minion]

What you are looking for, is a significant reduction that is an outlier from the trend and then a check of "other" roads to ensure that there isn't a corresponding increase - suggesting avoidance rather than improvement. Then you are looking for the same exposure to risk. i.e. not a change in vehicle use etc.

No, that's not correct. That's one possible factor but it isn't the only one. For example the roads with a limit over 40 stat you posted is probably irrelevant as the number of 30mph roads now dropped to 20 where there was a 50+ alternative that no one used is probably small.

Its also equally possible that roads were just more dangerous (hence the greater 40mph+ accidents) but the 20mph zones were even better.

But you can't cut this data too much, there aren't enough deaths to exclude noise if you start drilling into tinier and tinier subsets.

 

[IT Minion]

The real problem here is that this stuff is hard, it is hard to tease out complicating factors. It is hard to understand and exclude irrelevancies and overcomplicating it.

There must be academic studies or studies funded by the RAC that have done the hard work for us to a higher standard?

 

[motorbiking]

Unfortunately the authorities come up with an idea and then seek to prove it's worked or working. Most of the studies are funded, by those with a vested interest. In this case the idea is being rolled back, because it has become politically unpopular and that is really all that any politician cares about.

 

[IT Minion]

Unfortunately the authorities come up with an idea and then seek to prove it's worked or working. Most of the studies are funded, by those with a vested interest. In this case the idea is being rolled back, because it has become politically unpopular and that is really all that any politician cares about.

Just saying there's vested interests isn't a great critique. You can normally pull apart highly partisan papers and academic papers should be good enough if any exist.

It isn't being meaningfully rolled back is it? I thought it was only a few %, but don't pay that much attention to Wales.

 

[noseall]

As long as the increased traffic on our roads show they are not showing an increase in fatalities or casualties in 20MPH limits - they are here to stay where they are warranted. They actually show a reduction.

They are here to stay. Suck it up speeders.