The Connecticut Department of Transportation will begin work on Bridge No.00047 Old Kings Highway north over I-95 on April 1.

The project, according to the DOT, includes the complete replacement of the bridge super structure.
According to Captain Don Anderson of the Darien Police Department, the DPD will issue a traffic advisory when the project will affect local Darien streets. The DOT has not yet notified the department of when that could happen other than "this construction season," Anderson said.
"There will be a posted detour on Old King's Highway north for some significant time during this project, again however, the specific timing is not yet known.  In addition, there will be 8 to 10 complete evening/overnight closures of OKHN in the area of the bridge during the course of project as they set prefabricated sections of the new bridge into place," Anderson said, nothing the night closures would not be in succession.
Anderson said the police will send out a traffic advisory as soon as they receive more details from the DOT.

Impact on Old King's Highway north:

Old Kings Highway North will be closed at the bridge site for total, not exceeding, eight overnight periods.
No lane closures: Monday through Friday: 6 a.m. to 9 a.m. and 3 p.m. to 6 p.m. (I-95 ramps, Old Kings Highway and local roads); Saturday and Sunday between 10 a.m.

Lane closures on I-95 northbound will be:

Monday through Sunday between 9 p.m. and 6 a.m. with noted daily exceptions

No lane closures: Monday and Tuesday: 6 a.m. to 9 p.m.; Wednesday: 6 a.m. to 10 p.m. Thursday and Friday: 6 a.m. to 11 p.m. Saturday between 7 a.m. to 11 p.m.; Sunday between 8 a.m. and 11 p.m.

Lane closures on I-95 southbound will be:

Monday through Sunday between 9 p.m. and 5 a.m. with noted daily exceptions.

No lane closures: Monday through Thursday: 5 a.m. to 9 p.m.; Friday between 5 a.m. and 11 p.m.; Saturday between 6 a.m. and 11 p.m.; Sunday between 8 a.m. and 11 p.m.

Between 12:01 AM and 5:00 AM on all non-holiday days the contractor will be allowed to halt I-95 traffic for a period not to exceed 20 minutes to perform necessary work for the installation and setting of bridge members and for the removal of the existing bridge superstructure.
The project bid was awarded to New England Road Inc. at a cost of approximately of $4.5 million. It is expected to be completed by the end of November of this year.