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- A crash has taken place just after the M25 junction 20 roundabout near the A41 Watford Road Northbound.
- At 4.21pm, Hertfordshire County Council has asked people to avoid the area.
- Google Maps has said there is heavier traffic than usual in the area.
- The police confirmed a driver struck a lamppost with their car on the A41
- Delays are now expected to last 13 minutes, according to Google Maps
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