UKTC Archive

RE: Management of 'drawn up' deciduous tree and woodland strips along high speed roads

Subject: RE: Management of 'drawn up' deciduous tree and woodland strips along high speed roads
From: Brewster, Ian
Date: Jul 10 2019 14:51:59
Here is a typical view of such an area. Notice the trees grow towards the 
available light, path of least resistance and subsequently across the path of 
highway vehicles.

[cid:image002.jpg@01D53735.D1382650]

From: 
uktc-request@xxxxxx.tree-care.info<mailto:uktc-request@xxxxxx.tree-care.info> 
<uktc-request@xxxxxx.tree-care.info<mailto:uktc-request@xxxxxx.tree-care.info>>
 On Behalf Of Wayne Tyson
Sent: 10 July 2019 01:20
To: UK Tree Care 
<uktc@xxxxxx.tree-care.info<mailto:uktc@xxxxxx.tree-care.info>>
Subject: Re: Management of 'drawn up' deciduous tree and woodland strips 
along high speed roads

Thanks, Ian.

Can anyone provide a location or photos?

Wayne

On Tue, Jul 9, 2019 at 3:03 PM Brewster, Ian 
<Ian.Brewster@xxxxxxx.co.uk<mailto:Ian.Brewster@xxxxxxx.co.uk>>
wrote:

Hi Wayne,
The thinning is incidental to the operation by removing trees which a. Are
obstructing vehicles and b. Are structurally weakened because they have
used resources to compete for light versus stability via investment in top
growth than a standalone and sturdy single stem.


Sent from my Samsung Galaxy smartphone.

-------- Original message --------
From: Wayne Tyson <wt750mv@xxxxxx.com<mailto:wt750mv@xxxxxx.com>>
Date: 09/07/2019 22:37 (GMT+00:00)
To: UK Tree Care 
<uktc@xxxxxx.tree-care.info<mailto:uktc@xxxxxx.tree-care.info>>
Subject: Re: Management of 'drawn up' deciduous tree and woodland strips
along high speed roads

Seems like a context-dependent situation (aren't they all?). There are some
considerations, with which I presume most all y'all are familiar. I'm
including one in case it might shed light on the issue in general and might
be helpful in this case, and I will appreciate any feedback, positive or
not.

If trees are susceptible to windthrow, how much good will thinning actually
do to prevent their failure? Why do some trees resist wind forces and some
not? For example, many trees are left standing (even when shorn of leaves,
small branches, and even bark) after a tornado or hurricane. Please explain
this phenomenon, including what is a the root of the matter.

Wayne

On Tue, Jul 9, 2019 at 10:56 AM Brynley Andrews <brynley.andrews@xxxxxx.com
<mailto:brynley.andrews@xxxxxx.com%0b>> >
wrote:
Ian
Here is a typical view of such an area. Notice the trees grow towards the 
available light, path of least resistance and subsequently across the path of 
highway vehicles.

[cid:image002.jpg@01D53735.D1382650]

From: 
uktc-request@xxxxxx.tree-care.info<mailto:uktc-request@xxxxxx.tree-care.info> 
<uktc-request@xxxxxx.tree-care.info<mailto:uktc-request@xxxxxx.tree-care.info>>
 On Behalf Of Wayne Tyson
Sent: 10 July 2019 01:20
To: UK Tree Care 
<uktc@xxxxxx.tree-care.info<mailto:uktc@xxxxxx.tree-care.info>>
Subject: Re: Management of 'drawn up' deciduous tree and woodland strips 
along high speed roads

Thanks, Ian.

Can anyone provide a location or photos?

Wayne

On Tue, Jul 9, 2019 at 3:03 PM Brewster, Ian 
<Ian.Brewster@xxxxxxx.co.uk<mailto:Ian.Brewster@xxxxxxx.co.uk>>
wrote:

Hi Wayne,
The thinning is incidental to the operation by removing trees which a. Are
obstructing vehicles and b. Are structurally weakened because they have
used resources to compete for light versus stability via investment in top
growth than a standalone and sturdy single stem.


Sent from my Samsung Galaxy smartphone.

-------- Original message --------
From: Wayne Tyson <wt750mv@xxxxxx.com<mailto:wt750mv@xxxxxx.com>>
Date: 09/07/2019 22:37 (GMT+00:00)
To: UK Tree Care 
<uktc@xxxxxx.tree-care.info<mailto:uktc@xxxxxx.tree-care.info>>
Subject: Re: Management of 'drawn up' deciduous tree and woodland strips
along high speed roads

Seems like a context-dependent situation (aren't they all?). There are some
considerations, with which I presume most all y'all are familiar. I'm
including one in case it might shed light on the issue in general and might
be helpful in this case, and I will appreciate any feedback, positive or
not.

If trees are susceptible to windthrow, how much good will thinning actually
do to prevent their failure? Why do some trees resist wind forces and some
not? For example, many trees are left standing (even when shorn of leaves,
small branches, and even bark) after a tornado or hurricane. Please explain
this phenomenon, including what is a the root of the matter.

Wayne

On Tue, Jul 9, 2019 at 10:56 AM Brynley Andrews <brynley.andrews@xxxxxx.com
<mailto:brynley.andrews@xxxxxx.com%0b>> >
wrote:
Ian

Off topic slightly, but anyway......subject to site specific issues: there is 
a much higher risk to road users from run off road RTA involving hitting
a tree than tree fall.
Lowering the RTA-T risk doesn’t necessarily mean tree removal. Same goes for 
tree-fall management.
Regards Brynley
On Tue, 9 Jul 2019 at 17:52, Brewster, Ian 
<Ian.Brewster@xxxxxxx.co.uk<mailto:Ian.Brewster@xxxxxxx.co.uk>> wrote:

I'm facing a bit of a conundrum, my concern is thinning too much within a 
restricted width (2-5 trees in 5m depth) to remove overhang obstruction and 
risk exposing other drawn up structures to wind fracture/throw. Felling trees 
can be a concern for those residents who back on to these wooded areas. They 
would see the 'natural' screen and 'sound barrier' degrade. Perhaps the right 
decision for safety is to fell all trees and remove the potential risk of 
windthrow and managed in the future as small trees, scrub and coppice. 
Unfortunately for most of the areas I see this opportunity
lost and where trees have been allowed to grow, becoming 'drawn up'.
Tree strips along highways are often many miles long. A cost effective 
approach with traffic management is now required.
Considering the above have you experience with managing such areas, what is 
your considered best course of action and how have you dealt with the 
concerns from residents? Any help and suggestions would be appreciated.
NPS
 Off topic slightly, but anyway......subject to site specific issues: there 
is a much higher risk to road users from run off road RTA involving hitting
a tree than tree fall.
Lowering the RTA-T risk doesn’t necessarily mean tree removal. Same goes for 
tree-fall management.
Regards Brynley
On Tue, 9 Jul 2019 at 17:52, Brewster, Ian 
<Ian.Brewster@xxxxxxx.co.uk<mailto:Ian.Brewster@xxxxxxx.co.uk>> wrote:

I'm facing a bit of a conundrum, my concern is thinning too much within a 
restricted width (2-5 trees in 5m depth) to remove overhang obstruction and 
risk exposing other drawn up structures to wind fracture/throw. Felling trees 
can be a concern for those residents who back on to these wooded areas. They 
would see the 'natural' screen and 'sound barrier' degrade. Perhaps the right 
decision for safety is to fell all trees and remove the potential risk of 
windthrow and managed in the future as small trees, scrub and coppice. 
Unfortunately for most of the areas I see this opportunity
lost and where trees have been allowed to grow, becoming 'drawn up'.
Tree strips along highways are often many miles long. A cost effective 
approach with traffic management is now required.
Considering the above have you experience with managing such areas, what is 
your considered best course of action and how have you dealt with the 
concerns from residents? Any help and suggestions would be appreciated.



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