“I don't think it's going to be effective,” he said. “The speeding is going to continue. You're just wasting taxpayer money.”

“I watched people tentatively approach the circle,” said Forsyth, who lives within sight of the roundabout. Bicycle riders tended to “go right over the circle,” and pedestrians walked over it, bypassing the designated crosswalk.

“They're lucky,” Forsyth said, noting that many Johns Hopkins University students live nearby during the school year. “Students are gone for the summer and traffic is light.”

But for the most part, “People are stopping for you,” Forsyth said. “It's wonderful. The people on Canterbury have always had trouble getting across the 39th Street intersection. Now, you can stick your nose out into the circle — and there's an actual U-turn.”

If the roundabout makes area traffic safer, “we’ll all be very happy,” Clarke said. “I think we’re kind of a pilot” for the city.

“Many of us have been out observing,” said MacMillan, who has lived in the neighborhood for nearly 20 years. “It seems to be slowing traffic through the intersection. It's still speedy coming out of the intersection. Mostly there is some confusion. Some people don't seem to want to yield to the person in the circle.”

And she said that as motorists pick up speed coming out of the circle westbound, it's a little dangerous because the block from the circle to University Parkway is curvy and other motorists are trying to parallel-park.

Man-on-the-street interviews Sunday revealed a continuing divide.

“I quite like it,” said Mary Mills, 33, coming home with a bag of groceries. She said she has noticed a slowdown — “and construction wasn’t bad at all.”

Alexander Alexiou, 27, of Mount Vernon, found the traffic circle “annoying” as he walked to One World Cafe with a friend. “There’s plenty of roadwork to be done in Baltimore. What are they doing with our tax dollars?”

“Obviously, it’s not slowing anybody down,” said Jennifer Tollifson, 42, of Tuscany-Canterbury, walking with her husband, Timothy, and their dog, Bowie.

Erwin claimed that the city promised landscaping that has not been done. And, he said, “It’ll be interesting to see what’ll happen when it snows and plows come.”

Navigation tips

In hopes of avoiding confusion, Forsyth has compiled a list of tips on how to navigate the traffic circle safely and legally, including:

Obeying the yellow roundabout sign with an advisory speed limit of 5 miles per hour

Yielding to pedestrians in the crosswalk and traffic already in the roundabout

Looking for pedestrians and using your turn signal as you exit the roundabout.

Forsyth said traffic circles are often confusing at first.

She said in the case of the new one in Tuscany-Canterbury, “It occurred to me that that could be a problem once it was up and running.”