The clock starts running in September in a race to complete roadwork around the State Capitol before a new governor is inaugurated there in January.
Barber Brothers Contracting Co. got the contract award with a bid of $1.39 million, state Division of Administration spokesman Gregory Dupuis said. Exact start date of the 120-day job has not yet been determine, Dupuis said.
The project will convert the winding roads on either side of the Arsenal Park from one-way to two-way streets with round-abouts at either end of the park.
The traffic realignment is one of the last phases of a Capitol security upgrade that has already cost taxpayers $4.76 million.
The road project was postponed last year over concerns it would not be completed by the start of the 2015 legislative session.