As well as improving safety for passers by on the road this treatment helps preserve the life of the tree. Already 300 to 400 years old, given the absence of lightning strikes, road widening, etc. it could last another 400 or 500 years.
Uploaded to Geograph by Maurice Pullin on 23 March 2012
Photo © Maurice Pullin, 23 March 2012. Licensed for reuse under this Creative Commons licence