State transportation authorities are warning drivers that the Zakim Bridge will be closed each night this week during overnight hours for inspections.
MassDOT says the inspections will start Monday, with the closures beginning at 11:59 p.m. and lasting through 5 a.m. the next morning. The last inspection will finish early Friday morning.
Authorities are urging those who need to cross the bridge traveling on I-93 and Route 1 during those hours to seek alternate routes.
“Drivers that must travel through the affected area should expect delays, reduce speed and use caution while traveling along detour route,” MassDOT said in a statement.
The transportation authority released the following detour routes:
- For I-93 northbound: All traffic will be detoured off I-93 northbound at Exit 26. Travelers seeking to re-access I-93 northbound or Route 1 northbound can use Leverett Circle.
- For I-93 southbound: All traffic will be detoured off I-93 southbound at Exit 28 in Somerville. Drivers seeking to re-access I-93 southbound will be detoured through Sullivan Square, across the North Washington Street Bridge, and then to the I-93 southbound on-ramp in the Haymarket area.
- Route 1 northbound: Drivers in downtown Boston seeking to access Route 1 northbound can use the Leverett Circle.
- Route 1 southbound: All traffic will be detoured off Route 1 southbound and into Charlestown. To re-access Route 1 southbound or I-93 southbound, travelers will be directed across the North Washington Street Bridge and to the I-93 south on-ramp in the Haymarket area.