Part of Meadow Lane in Sudbury was closed yesterday for repairs to a surface water drain under the road.
Anglian Water is carrying out the work and it hopes to be finished by Friday, August 2.
The company has warned though that this is only an estimated finish time, as it depends on what workers find when they dig up the road.
“We are excavating a surface water sewer which is about one-and-a-half metres below the ground,” said spokesman Ciaran Nelson.
“The flow appears to be restricted and the surface water hasn’t been draining away as quickly as it should.”
He said the company had put up signs giving advance notice of the road closure and had written to properties in the road, which includes the Meadow Lane doctor’s surgery, part of Hardwicke House Group Practice, and The Red House retirement home.
The spokesman assured householders that their water supply would not be affected by the work, and the aim was to get it completed as soon as possible.
Mr Nelson added: “We do apologise that people are going to be disrupted and, if anyone has any problems with access, we will be on site and people are welcome to ask us any questions.”