A BUSY junction will undergo months of essential maintenance works and bring misery to thousands of motorists trying to get on and off the motorway.
The Highways Agency will be replacing piers – the main support for the bridge – on the east and west bridges of junction 9.
Junction 9 of the M27 is near Park Gate, about eight miles west of Portsmouth.
Work will start on Friday, February 15 and will last for seven months.
The work, which will cost £5m, will extend the life of both bridges and a new concrete barrier will improve safety underneath.
The bridges were built in the 1970s and the Highways Agency will be replacing the original bridge deck bearings and expansion joints.
It will also be carrying out associated drainage work.
During the work, the lanes will remain as three but will be narrowed.
Because of the narrow lanes, the speed limit will be reduced and average speed cameras will be installed to monitor motorists.
Work is planned to take place six days a week during day and night shifts, with occasional lane closures taking place at night.
A Highways Agency spokesperson said: ‘Later this month we will start work on a scheme to replace key components on the bridges.
‘This work will extend the life of the structures and keep journeys safe and reliable for the many drivers who use this junction.
‘By using narrow lanes, we will keep three lanes open to traffic in both directions during peak periods, keeping disruption to a minimum.
‘We thank drivers for their patience during this essential work.’
The work will be completed by the end of September.
Other motorway resurfacing work will see the M27 closed between junction 4 and 5 for three days from Saturday, March 23.
Diversions will be set up through Eastleigh and Bassett.