More Videos

Kennedy proposes income tax cut in 1962 2:04

Kennedy proposes income tax cut in 1962

NFL Commissioner: ‘We believe that everyone should stand for the national anthem’ 2:26

NFL Commissioner: ‘We believe that everyone should stand for the national anthem’

Trump denies account of call with soldier's widow 2:34

Trump denies account of call with soldier's widow

Sessions defends Comey firing, denies Russia collusion 2:07

Sessions defends Comey firing, denies Russia collusion

Trump welcomes Pittsburgh Penguins to White House for Stanley Cup visit 1:56

Trump welcomes Pittsburgh Penguins to White House for Stanley Cup visit

A Miami congressional candidate talks about her encounters with extraterrestrials 8:56

A Miami congressional candidate talks about her encounters with extraterrestrials

Recording sheds light on Cuba sonic attacks targeting US workers 1:56

Recording sheds light on Cuba sonic attacks targeting US workers

Northern California scorched as wildfires rage on 1:39

Northern California scorched as wildfires rage on

Senate Russia inquiry has expanded 1:56

Senate Russia inquiry has expanded

Take a look inside an illegal marijuana grow house in Merced 0:38

Take a look inside an illegal marijuana grow house in Merced

  • How roundabouts work

    Roundabouts, used in place of stop signs and traffic signals, are a type of circular intersection that can significantly improve traffic flow and safety, according to the American Insurance Institute for Highway Safety. In this 2010 video, IIHS explains that where roundabouts were installed, motor vehicle crashes declined by about 40 percent, and those involving injuries were reduced by about 80 percent.

How roundabouts work

Roundabouts, used in place of stop signs and traffic signals, are a type of circular intersection that can significantly improve traffic flow and safety, according to the American Insurance Institute for Highway Safety. In this 2010 video, IIHS explains that where roundabouts were installed, motor vehicle crashes declined by about 40 percent, and those involving injuries were reduced by about 80 percent.
IIHS