Moderate delays are expected between junctions 26 and 27 up until the end of October due to roadworks closing two lanes.
The Highways Agency will close the M25 lanes overnight between 10pm and 5.30am for the next month.
Junction 26 anti-clockwise carriageway exit for Waltham Abbey will be closed overnight on Wednesday.
Road users will be redirected by diversion at Junction 25 and are warned to expect delays of more than 10 minutes.
The estimated cost for the works is £188m and will include new signage and lighting.
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