Roadworks, which have angered some traders in a Derbyshire town, are to finish three weeks ahead of schedule.
The A6 through Duffield has been closed since 5 July while gas mains were replaced by the National Grid.
Some shopkeepers have said their takings are down by more than 50% because of the closure of Town Street.
The National Grid said the road would reopen on Saturday morning and has thanked businesses and residents for their patience.
Temporary traffic lights will be in place along Town Street for the final phase of work which will start on Monday and is expected to continue until the end of November.
Dave Orton, from the National Grid said: "I would like to thank the residents, businesses and road users for their patience whilst the road closure was in place.
"We have worked very closely with the Highways Authority on a suitable traffic management programme for this project. Due to engineering and safety constraints, the road closure and diversions were necessary."
Firms have been told they can apply for compensation packages after the work has been completed in November.