Roadworks on Hull's A63 Castle Street will be taking place from the start of next month.
Motorists using the busy road through the city centre are being warned the Highways Agency will be carrying out the ground survey works.
The initial works are due to start from the first week of June and will last for about a week. The majority of the work will take place on the main carriageway of the A63 between Market Place and Porter Street, with some work also taking place on some side roads.
During the work, there will be various overnight lane closures on parts of the A63 main carriageway from 8pm to 6am. Lane closures on side roads will be carried out during the day, from 9.30am to 4pm.
Delays are expected to be slight and the work will be carefully timed in order to minimise noise disruption to nearby residents.
The second phase of work will involve more detailed ground investigations of the A63 and is expected to last about three months from June 17.