Clifton Suspension Bridge will be closed to all traffic and cyclists for five days next week.
The "essential works", which include engineering inspections and cabling works for the new toll houses, will be carried out between Monday (June 10) and Friday (June 14).
Motorists and cyclists will be unable to use the bridge during this period, from 9.30am to 3.30pm each day.
A diversion route will be signed, using Bridge Valley Road, Brunel Way and A369 Rownham Hill.
Bridge master, Trish Johnson, said: “We will be carrying out our annual inspection of the main chains using access platforms which cannot safely be used with traffic on the bridge.
"We will also be using the time to commence the transfer of cabling and equipment into the new toll houses together with the removal of the temporary toll houses on each side of the bridge.
“During these bridge closures pedestrians will still be able to use the bridge, but cycling will be prohibited.
"Cyclists may dismount and walk across the bridge, but as only one narrow footway will be open, cyclists are requested to avoid using the bridge if possible."
She added: “Clifton Suspension Bridge Trust wishes to apologise for the inconvenience which these closures will cause.
"We hope that by re-opening the road overnight and during the morning and evening peak periods we will minimise the difficulties caused.”
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