Delays are expected in Rickmansworth next week as a water company begins installing a new meter.
Affinity Water will be replacing an external meter in High Street, Rickmansworth, near Marks and Spencers and The Fox and Hounds.
The work is due to start next Wednesday and is scheduled to finish on Friday.
Workmen are expected to use some of the carriageway while they are completing the work.
Motorists are warning that delays are possible.
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