A MAJOR upgrade of the M25 will lead to a series of overnight closures later this month.
The scheme will increase capacity on the road between Junction 5 for Sevenoaks, Junctions 6 for Godsone and Junction 7 for the M23.
The London-bound M26 between the M20 and the M25 will also be closed on selected dates while gantries and signs are installed, the Highways Agency said.
John Payne, Highways Agency project manager said: "We have now completed the new concrete central reservation barrier and are progressing with work to convert the hard shoulder into a live running lane. As we move on and work on different sections of the project, we need to alter the road layout as we go.
"We're also installing new gantries and signs which will ultimately provide road users with valuable information that will reduce congestion and improve journey time reliability.
"To do all that we need to temporarily close carriageways, and to minimise the disruption to road users, we have planned the closures to take place overnight, when traffic flows are lowest. I would advise anyone wishing to use the M25 on these dates to plan their journeys in advance and allow extra time."
The M25 will be closed anti-clockwise between Junctions 6 and 5 overnight, weather permitting, on Saturday 21 September, Saturday 28 September, Saturday 5 October, Saturday 16 November, Saturday 23 November and Saturday 30 November.
Drivers will be diverted via the A22 and A25.
Meanwhile the Londonbound M26 between the M20 and the M25 will be closed overnight on Saturday September 21 between 10pm and 6am, on Sunday September 22 between 10.30pm and 5.30am and
from Monday 23 to Thursday 26 September inclusive between 10pm and 5.30am.
Drivers will be diverted via the A20 and the M20.
