Open Streets Dorchester, take two: City officials will for the second consecutive year temporarily shut down Dorchester Avenue to vehicle traffic between Ashmont Street and Freeport Street this coming Sunday (Sept. 17) and open it up to people and more than 100 vendors. The route has been shortened from last year’s event, when the southern terminus was Gallivan Boulevard.

The closure of the thoroughfare will begin at 9 a.m., with events starting at 10 a.m. and continuing until 3:30 p.m.

Mayor Wu set up “Open Streets” at sites across the city last year to encourage a rethinking of how city streets are used, and to make Boston more family friendly. Open Streets events took place earlier this year in Jamaica Plain, Allston-Brighton, and along Blue Hill Avenue along the Dorchester/Roxbury border. Another is set for Oct. 16 in East Boston along Meridian and Bennington Streets.

The list of vendors includes 2 Curls 1 Mission, Casa Myrna Inc., Fabe Jewelry, Greater Ashmont Main Street, Mimi’s Bling Creations, Nefertiti Travel, Cricket Wireless, East Coast School of Combined Martial Arts, and The Black Balloon Company, among others.

The idea driving the “Open Streets” program is that closing the avenue to vehicles for a time will allow community members to walk, bike, and talk to vendors.

“Last year was a reimagining of what’s possible when we think about transforming our streets, from how we connect to where we connect with each other, “Wu said earlier this year. “That’s why as part of our commitment to making Boston the best place in the country to raise a family we’re expanding our efforts this year to not only have those three successful events continue in the community but to add Allston-Brighton and East Boston.”

Open Streets programming is free and will include food trucks as well as various activities for kids such as face painting, balloon animals, crafts, and interactive games.