Work to replace sections of the barriers on the M5 sliproad at Junction 18 near Avonmouth will begin next week.
The scheme, which will start Monday, 3 August, will involve the removal of the current steel restraint barriers, replacing them with concrete ones. The work is scheduled to be completed by Tuesday, 18 August.
The majority of the work will take place overnight Monday and Friday between 8pm and 6am and the southbound sliproad will be closed completely during these times. There will also be daytime lane closures in place for the first two days.
Highways Agency project sponsor Dave Frampton said,
The existing barrier has reached the end of its life and needs to be replaced to maintain safe and reliable journeys on this vital route.
The work has been carefully planned and is being carried out when traffic flows are lowest for the majority of the scheme to minimise disruption.
For the safety of road users and to protect the initial installation of the new barriers there will also be a lane two closure in place during the day on 3 and 4 August. .Drivers are advised to allow slightly more time to complete their journeys.
A fully signed diversion route will be in place while the night time closures are in place.
Members of the public should contact the Highways England customer contact centre on 0300 123 5000.
Journalists should contact the Highways England press office on 0844 693 1448 and use the menu to speak to the most appropriate press officer.