If you live on the East Coast, you may have driven through roundabouts in your neighborhood countless times. Or maybe, if you’re in some parts farther west, you’ve never encountered one of these intersections. But roundabouts, while a relatively new traffic control measure, are catching on across the United States.

In the years since the Great Recession, when housing prices dramatically fell, Wall Street investors have been buying large numbers of single-family homes to use as rentals. As of 2022, big investment firms owned nearly 600,000 such properties nationwide.

An unprecedented surge in the nationwide construction of new housing — mostly apartments — may finally be making a dent in fast-rising rents that have been making life harder for tenants.

More than 1.65 million housing units were under construction last year, the highest annual number since federal record-keeping started in 1969. This year, the number was even higher — almost 1.7 million in September.