Rhode Island was added this week to the Connecticut-New Jersey-New York regional COVID-19 travel advisory list.
Anyone spending 24 hours or longer in Rhode Island is required to self-quarantine for 14 days after returning to the Tri-State region.
Travelers entering Connecticut from Rhode Island or any of the other 33 impacted states also must complete and submit a form on arrival.
Delaware and Washington, D.C. were removed from the list this week, which also includes Puerto Rico.
States with positive COVID-19 test rates greater than 10 per 100,000 or with a positivity rate of 10% or higher over a seven-day rolling average are added to the list, which is updated weekly.
Workers traveling from impacted states who work in critical infrastructure as designated by the federal Cybersecurity and Infrastructure Security Agency are exempted from the self-quarantine quarantine if their travel was work-related.
Travelers from impacted states unable to self-quarantine may be able to enter Connecticut if they have a negative viral test (not an antibody test) for COVID-19 in the 72 hours prior to travel.
Also exempted are state, local, and federal officials and employees traveling in official capacities on government business.
The U.S. State Department lifted its five-month old advisory Aug. 6 advising U.S. citizens to avoid all international travel.
"With health and safety conditions improving in some countries and potentially deteriorating in others, the department is returning to our previous system of country-specific levels of travel advice," the agency said in a release.
"This will also provide U.S. citizens more detailed information about the current status in each country.
"We continue to recommend U.S. citizens exercise caution when traveling abroad due to the unpredictable nature of the pandemic."
The agency said the advisory was lifted in coordination with the U.S. Centers for Disease Control and Prevention.