UKTC Archive

Re: Windshield/Drive-by | Speed Limit

Subject: Re: Windshield/Drive-by | Speed Limit
From: Michael Richardson
Date: Nov 29 2019 13:37:19
Unfortunately, like your 'Briefing Note on UK Summer Branch Drop', your
guidance, and the LANTRA course you helped design, doesn't pass muster on
three key tree risk-benefit management criteria, because.

1) It's not reasonable
2) It's not proportionate
3) It's not reasonably practicable

This isn't just my view either.  It's increasingly coming from risk
experts, duty holders, and highways/roads managers both in the UK and
abroad.

David from your writings I have learned that TRAQ, QTRA, and PTI are no
good.  You state above three criteria that are necessary.  Can you please
tell us exactly what is reasonable, practical and proportionate for one
single example?  Lets use KEW gardens in Richmond as the site; exactly how
many minutes and seconds per tree, how often and what qualifications are
needed to do a risk benefit analysis there..  Further can you please tell
us the exact risk vs. benefit for the massive *Quercus castaneifolia*.

It is all very nice to talk about the three criteria but please show us how
you implement them.


Michael Richardson B.Sc.F., BCMA
Ontario MTCU Qualified Arborist
Richardson Tree Care
Richardsontreecare.ca
613-475-2877
800-769-9183

  <http://www.richardsontreecare.ca/images/Tree_Doc_logo_email.png>



On Fri, Nov 29, 2019 at 3:58 AM David Evans <david@xxxxxxxxxxxxxx.com> wrote:

<<Maybe the internet access is not that good in Tasmania>>

Hi Jeremy

Ironically, I didn't receive this for a couple of days because I've been
checking out some tree risk-benefit management for Tasmanian Parks, and the
internet access was beyond 'not that good' most of the time.  It was
non-existent.

Naturally, I'm very familiar with all of your links, but thanks for
sharing in case some might not have been aware of the wider context.
 However, the answer to the question I asked about the windshield/drive-by
speed limit isn't answered in your reply.

<<...and involves a vehicle being driven at low speed...>>

A 'low speed' would likely mean 10 different speeds to 10 different
people.  Worse still, if one of 'your obvious defects' was missed and a
risk realised, then it's all too easy to claim (with hindsight bias) that
the assessor wasn't driving at a low enough speed.

Unfortunately, like your 'Briefing Note on UK Summer Branch Drop', your
guidance, and the LANTRA course you helped design, doesn't pass muster on
three key tree risk-benefit management criteria, because.

1) It's not reasonable
2) It's not proportionate
3) It's not reasonably practicable

This isn't just my view either.  It's increasingly coming from risk
experts, duty holders, and highways/roads managers both in the UK and
abroad.

Cheers

Acer Ventura




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The UKTC is supported by Bosky Trees arboricultural consultancy
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