Accelerated construction on a bridge in Westport is expected to cause significant delays on Interstate 95 this fall, according to the state Department of Transportation.

The construction will be done on a bridge over Saugatuk Avenue on I-95 near exit 17 in Westport.

The first lateral slide begins on the northbound side of the I-95 bridge over Saugatuk Avenue on Oct. 20 at 8 p.m. and is expected to be completed by 6 a.m. on Oct. 23, the DOT said.

The second lateral slide begins on the southbound side of the I-95 bridge over Naugatuck at 8 p.m. on Nov. 3 and is expected to be finished by 6 a.m. on Nov. 6.

The lateral slide “will severely restrict traffic to two lanes in each [direction] on I-95 on both of those weekends,” officials said.