Help Forum

Help requested posted on 9th July 2019:

Collision reduction schemes / cost

Does anyone have up to date data sets they are willing to share around collision reduction cost savings. Many thanks - Cheryl.

Cheryl Evans

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Response posted on 9th July 2019 by:
Dan

E: Daniel.Trump@jacobs.com
T:

Collision reduction schemes / cost

Hi Cheryl,

The DfT publish this each year in Reported Road Casualties GB, tables RAS6001 and RAS6002.

There are also values in Webtag guidance though these may be more dated.


Response posted on 10th July 2019 by:
cheryl evans

E: cheryl.evans@westberks.gov.uk
T: 01635519984

Collision reduction schemes / cost

Thanks Daniel but I mean the cost saving when an engineering solution is implemented. I have old Oxford data - ie mini roundabouts, Traffic signals 50%, signing and lining 30% but data is about 15 years old. I understand Council where asked to record cost savings onto a system called molasses but that is not around now. Hope I am making sense - any help would be appreciated
Thanks
Cheryl


Response posted on 10th July 2019 by:
Adrian Watling

E: adrianwatling@southend.gov.uk
T: 01702215398

Collision reduction schemes / cost

Below is a link to the a Bristol & Somerset CC Traffic Choices website which has some good information regarding Traffic schemes. It may not give the detail you require but may be helpful. The costings are a bit out of date now.


Response posted on 10th July 2019 by:
cheryl evans

E: cheryl.evans@westberks.gov.uk
T: 01635519984

Collision reduction schemes / cost

Thanks Adrian, some excellent information but it still no figures on the cost effectiveness of the engineering solution.
So what I have as an example is by treating a cluster site it gave a 40 % collison reduction at that site by putting in a mini- roundabout. I am presuming all Council engineers look at the collison effectiveness of their engineering intervention but it's proving difficult to get any info from any engineering teams. I thought as an evaluation process Engineering was far more recordable than Education but I am beginning to doubt this - hoping someone is willing to share this information


Response posted on 10th July 2019 by:
cheryl evans

E: cheryl.evans@westberks.gov.uk
T: 01635519984

Collision reduction schemes / cost

It's all to do with working out first year rate returns, what is everyone using as the % collison rate reduction?


Response posted on 10th July 2019 by:
Kate Carpenter

E: kate.carpenter@jacobs.com
T:

Collision reduction schemes / cost

sorry I don't have a current table of predicted reduction, but a reminder of something that people often seem to forget. many people are still using % reductions based on before figures from a time when collision frequency was twice or 3 times what it is now.

as collisions fall, proportions are not the same and prevent-ability becomes ever more difficult and the likelihood of preventing collisions becomes proportionately lower. If collisions on a route have halved in the last 20 years, a scheme not only has half the collisions to target, but those left tend to be less susceptible.

This is positively offset by the EU general directive that will see all new cars in a couple of years with autonomous braking, lane assist, intelligent speed assist (no speeding in practical terms) etc. There will be some complex interactions, idiot drivers swerving around these newly-compliant vehicles, but the net effect is likely to be massively beneficial.

It's going to be very complicated, way beyond a RoSPA AIP manual table I suspect. And very interesting :-)


Response posted on 10th July 2019 by:
ADRIAN WALSH

E: awalsh@roadsafe.com
T: 7887552708

Collision reduction schemes / cost

I hope that you will find the information at :
http://toolkit.irap.org/ useful. Building on decades of road safety research, the Toolkit helps engineers, planners and policy makers develop safety plans for car occupants, motorcyclists, pedestrians, bicyclists, heavy vehicle occupants and public transport users.


Response posted on 11th July 2019 by:
Becky Hadley

E: becky.hadley@hadstrong.com
T: 7733054839

Collision reduction schemes / cost

Hi Cheryl
I think your best bet might be to approach the Road Safety Foundation - they are able to assess a road and advise potential engineering changes (can be as simple as white lines) and the cost/return on investment over time.
Becky


Response posted on 11th July 2019 by:
cheryl evans

E: cheryl.evans@westberks.gov.uk
T: 01635519984

Collision reduction schemes / cost

All hugely interesting BUT why can't anyone provide me with their tables based on engineering solution collision reduction charts?

I have spent many years that ETP can't prove collision reduction figures to find I can't get engineering scheme data! Really really really surprised I am on a training course that relies on figures 15 years old because no one is willing to share or is it that nobody is actually monitoring the effectiveness of engineering schemes any more???? Hope for us yet for those in ETP roles when evaluating behaviour change and worthy investing in ETP Road Safety teams!
Zero vision is going to need all our help - just hope that at least one Council can step up and share there scheme collisions reduction charts and make others think - looking forward to hearing from you where ever you are


Response posted on 12th July 2019 by:
Rachel Talbot

E: r.k.talbot@lboro.ac.uk
T:

Collision reduction schemes / cost

I can't provide the tables you require as I do not work for a council. However I worked on a large road safety European project (SafetyCube) that looked at road user, vehicle and infrastructure risk and countermeasures. There was also chuck of work on cost benefit / economic efficiency that resulted in the creation of a calculator. The results and the calculator can be found here: https://www.roadsafety-dss.eu/#/

There does seem to be a lack of good evaluation studies and this is partly due to their complexity and lack of resources. If you are looking at ‘cost’ in terms of casualty reduction, then calculating the reduction of crashes/injuries is only part of the problem – you have to also have up to date cost data which has to be calculated. I think the UK uses ‘willingness to pay’ as a cost of injury/death but that is only part of a cost calculation.


Response posted on 16th July 2019 by:
cheryl evans

E: cheryl.evans@westberks.gov.uk
T: 01635519984

Collision reduction schemes / cost

So still no closer to current data. TRL512 Report, 10 councils took part in providing data for measuring Road Safety Schemes using MOLAsSES. Are any of you still collecting the data and willing to share?


Response posted on 22nd July 2019 by:
John McK Lambert

E: lambertj235@bigpond.com
T:

Collision reduction schemes / cost

Cheryl
There is an underlying problem with a lot of the work that I became aware over nearly three decades of looking at speeding and speed limit enforcement. Many researchers found the reduction in crashes in the range from around 20% to 70%. Yet I knew that the contribution of speeding to crashes was much lower than that. It wasn't until Idris Francis (very sadly he died early February 2019) downloaded the information on 5.5 million police reported crashes from 1987 to 2011 (with a lot of records locations were wrong so he ended up with just under 4 million usable records). He also approached all the camera authorities for accurate location details of fixed cameras and mobile camera sites and the date that operation was commenced. He ended up with around 3800 camera location and installation records. He was then able to determine the actual downward trend line in numbers of crashes, and was able to compare the trend lines for camera sites to those for all other sites. He showed conclusively that enforcement cameras achieved nothing in reducing road trauma. So the gains "shown" by others were in fact due to overall trends and not the cameras. And this issue would also apply to other initiatives.


Response posted on 5th September 2019 by:
Paul McKenna

E: paul.mckenna@capita.co.uk
T:

Collision reduction schemes / cost

Hi,

I've put this question to some Road Safety Data analysts and they are keen to investigate the matter further. They have asked for a wish list of what we would like to see to help deliver casualty savings so please respond or contact me by E mail with any suggestions. If anyone would be willing to share any 'Collision Investigation Studies' Road Safety Studies' or Engineering Safety Studies' with me to ensure best practice in the meantime that would be hugely beneficial. I would also be more than happy to share our Studies as they tend to be readily available as they're occasionally used as examples by Local Authorities.

Many thanks


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