Repair work, carried out on behalf of Hertfordshire County Council, will begin on the Napsbury Lane bridge, which crosses the A414 between Park Street roundabout and London Colney roundabout, in late July.
Preparation work will start on Saturday 25 July with a full night-time closure of both east and westbound carriageways (20.00 to 5.00).
Starting from Sunday 26 July, there will be a 24 hour lane closure (lane 2) for 16 weeks on the A414 North Orbital in both directions (eastbound and westbound). There will also be road closures on Napsbury Lane (B5378) for part of this period. This is because of essential repairs to the Napsbury Lane bridge to address corrosion, which impacts the integrity of the bridge’s structure.