The Center Street underpass will be closed Wednesday and Thursday from 9 a.m. to 3 p.m.
Crews will be taking samples of the asphalt and drilling four, 25 feet deep cores and one up to four-foot deep core.
Officials said this will help engineers plan the foundation for future repairs to the structure.
You are asked to avoid the area and use alternate routes.
The renovation project is currently in the final design phase.
Construction will be scheduled as federal highway funding becomes available.