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Japanese Knotweed in roadside vegetation

Reported via mobile in the Vegetation (grass/hedges/trees) category anonymously at 09:50, Friday 18 June 2021

Sent to National Highways less than a minute later

Reported to Gloucester highways several weeks ago who have now referred me to highways England. A patch of Japanese Knotweed is growing in the vegetation but unfortunately before Glos highways got back to me there has been vegetation cutting and work on retaining wall which has possibly disturbed the Knotweed.

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  • Thank you for contacting Highways England. concerning Japanese Knotweed.

    We shall look into this issue and aim to provide a response by 02/07/21.

    Can we please ask that you check back on this date for an update.

    Kind regards

    Highways England

    Posted by National Highways at 09:45, Monday 21 June 2021

  • Thank you for your report with regard to Japanese Knotweed and work on the wall at this location.

    During construction works to erect a retaining wall outside of Norton House in Boxbush on the A40, the following works were carried out with regard to Japanese Knotweed removal:

    Complete excavation of knotweed to remove all lateral spread of knotweed rhizome up to the boundary of the site, and vertical spread of rhizome to an average depth of 1.5m.

    The knotweed-contaminated waste was loaded directly into our 8-wheel tipper lorries, positioned on the footpath/road adjacent to the dig area. The contaminated waste was removed from site to a specially licensed landfill facility for disposal.

    Root barriers expertly installed to the boundary of the site where knotweed rhizome is present to the neighbouring site/pavement.

    Expert Supervision ensures complete removal of the knotweed in accordance to the methodology and a clean site on completion.

    Remaining on-site knotweed to be subject to a programme of systemic herbicide applications providing long term control of the plant. If you require any further update on this issue our Customer Contact Centre is available 24 hours a day at: • 0300 123 5000


    Please quote 21963135 to discuss this matter further.

    Kind regards Highways England

    Posted by National Highways at 07:57, Tuesday 29 June 2021

  • State changed to: Closed

    Updated by National Highways at 07:58, Tuesday 29 June 2021

This report is now closed to updates. You can make a new report in the same location.