Herts Highways are warning of delays at the Bluecoats Roundabout during August due to the replacement of traffic signals at the busy junction.
Work will take place between 30th July and 17th August, with lane closures in place between 9:30am and 4pm.
Recent lane closures for gas works saw reported delays of over an hour on the A414 and in Mill Road, with many people taking to social media to express their frustration.
The public are advised to use alternative routes if possible.
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