A crash involving a car and motorbike on the M25 has shut two lanes of the motorway, causing long delays to motorists.
Queues are building along the anticlockwise stretch from junction 27 for the M11 and Epping and Junction 26 for Waltham Abbey.
Emergency services are responding to the scene, live reports from Inrix show.
Meanwhile, there are two-hour delays on the A3 into London.
National Highways has warned of the tailbacks between the A244 junction at Esher and the A309 at Chessington due to TfL works at Tolworth Underpass.
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Two hour delays on the A3
09:58 , Will Mata
National Highways has warned of two hour delays facing motorists on the A3.
There is approximately three miles of congestion as highways teams respond to TfL works going on in west London.
The agency tweeted that delays are being felt between the A244 junction at Esher and the A309 at Chessington.