UKTC Archive

Re: Windshield/Drive-by | Speed Limit

Subject: Re: Windshield/Drive-by | Speed Limit
From: dlj
Date: Nov 25 2019 12:09:21
It doesn't surprise me that nobody has written a drive by tree assessment protocol.

It seems to me to be like scanning one side of a two sided piece of paper and believing that you know the whole story.

How fast you are able to drive past to get the gist from a superficial sample from just half a story seems irrelevant because however fast (or slow) the facing side is assessed, that protocol will miss things by design.


On 2019-11-25 09:58, David Evans wrote:
I'm in Hobart at the moment. Helping the Tasmanian Government deliver a
reasonable, proportionate, and reasonably practicable approach to tree
risk-benefit assessment and management, following a coronial inquest into a
death on one of their roads.

One of the issues we were exploring today was the specification for a
windshield/drive-by specification. I've raised this on here before, when trying to find out whether anyone had actually written one. It turns out
that, so far, no one has does (beyond that they will carry one out).

The straw poll I'd value your collective opinion on, is;

A driver and a spotter. Both sides of the road driven. At what speed do you reckon a windshield/drive-by should be carried out to pick up 'Obvious

For example, is driving at around 30mph going to reveal significantly less obvious defects than driving at about 10mph? Or significantly more obvious
defects than driving somewhere close to 50mph?

If you had to choose a speed limit, what would it be?

If you're uncomfortable posting your opinion on here, please email me off

As with all of VALID's publications, because it's a not-for-profit, when this is completed I'll happily share with everyone under a creative commons

*Obvious Tree Defects Guide


Acer Ventura

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