Motorists are facing delays as essential work is carried out on a water main.
Utility company Thames Water is carrying out the work in the A504 Muswell Hill and has blocked off one lane as work is done to repair a leaky main.
Temporary traffic lights are in operation during the roadworks, which could take up to a week to complete.
Traffic is likely to be heavy through Muswell Hill and Hornsey, along Priory Road while the repair is carried out.
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