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<p>Currently Highways England has a programme to replace the joints between the concrete
slabs between junctions 9 and 11. This work is being done to ensure the road surface
is maintained in good condition, but it should also help to reduce noise from the
road surface.</p><p> </p><p>Highways England is also carrying out trials to test materials
and techniques which could help to reduce road noise from concrete surfacing on the
M25 network. This trial is being carried out on the M1 motorway southbound between
junctions 5 and 6.</p><p> </p><p>This trial is due to finish in 2022 and the findings
will be used to develop our long-term strategy for managing concrete road surfaces
in the south east. The trial does include a period of accelerated testing on other
parts of the strategic road network before 2022, and Highways England will keep this
under review.</p><p> </p><p>Highways England will monitor the condition and safety
of the strategic network regularly and the surface of the M25 between junctions 10
and 11 is inspected weekly. Any safety critical defects will be repaired within 24
hours with a permanent repair completed within 28 days.</p><p> </p>
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