There are delays of up to 14 minutes on the A602 in Stevenage this morning as congestion builds.
The average speed is around 5mph on the A602 Hitchin Road going eastbound.
Traffic is building all the way up to the roundabout for the A1(M) Junction 8 slip road, and along the A602 towards Hitchin.
There are also queues on Martins Way and North Road in Stevenage.
Herts Highways have tweeted to say there are clearance plans running to help alleviate some of the delays.
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