Drivers are advised of major changes on the A3 between Ockham Park roundabout and M25 Junction 10 starting from 5:30am on Wednesday 7 May 2025, lasting until the end of the year. A contraflow system will be in place to allow carriageway widening works while keeping three lanes open in both directions.
Northbound:
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Speed limit reduced from 50mph to 30mph due to narrow lanes.
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Lane guide:
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Inside lane: M25 exit (both directions)
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Middle lane: A3 through traffic
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Outside lane: A3 cars only (HGVs not allowed)
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Southbound (from 7 May):
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Speed limit remains at 50mph.
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Lane guide after M25 J10 exit:
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Inside lane: All traffic, including HGVs and those exiting at Ockham Park.
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Outside lane: Contraflow (cars only, no HGVs, and no exit at Ockham Park).
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Drivers heading to RHS Wisley or Ripley must stay in the inside lane southbound. HGVs are restricted from using the contraflow lanes.