Le Val des Terres will close for around an hour and a half this evening to allow 'urgent tree works' to go ahead.
Traffic & Highways says an 'unsafe tree' up the Le Val des Terres requires urgent attention, as it poses a potential risk to the public.
The winding hill in St Peter Port will be closed from 6PM tonight (28 January), when services suspect the majority of commuter traffic will have subsided.
Pedestrians and cyclists will still be able to pass through during the closure, and a diversion for vehicles will be in place along Fountain Street and Colborne Road.
The road is expected to reopen by 7:30pm.
Another closure is scheduled to take place from 3 to 16 February for wider tree surgery works.

            Guernsey's police complaints process not 'in crisis'
        
            Guernsey could be disgraced Andrew’s new home - Royal biographer
        
            Guernsey Museums close for the season
        
            First visit of an EU ambassador to Guernsey
        
            Hotel guests help grow a greener Guernsey
        
            Guernsey man seeks donations after 2,000-mile challenge
        
            Charity funds upgrades at Guernsey swimming pool
        
            Under used Guernsey post boxes to close in early November