The accident occurred at about 11:50 a.m. on southbound I-95 between Exit 17 and Exit 16.
One person was transported to Norwalk Hospital by Westport EMS for further evaluation of apparent non-life-threatening injuries, fire officials said.
The Westport Fire Department responded with one Command Car, one Engine and one Rescue Company.
Click here to follow Daily Voice Westport and receive free news updates.