What is the Difference between a Rotary & a Roundabout? |
| > Roundabout FAQ | > CCRPC Roundabout Projects & Information |
For example, here is an aerial image of a Rotary:View Larger Map |
This is what it looks like on the ground:View Larger Map |
For example, here is an aerial image of a Roundabout:View Larger Map |
This is what a Roundabout looks like on the ground:View Larger Map |
The primary difference between a Roundabout and a Rotary is in its Size:
- The greater size and expanded geometry of the Rotary allows for much higher speeds, which in-turn allows for higher injury and fatality rates during crashes.
- The Rotary example (above) has two lanes allowing for "multi-lane weaving", which is an additional traffic phenomenon associated with higher crash rates.
|
| This image is of a conversion of a Rotary into a Roundabout in Kingston, NY, off of I-87. Here the size difference between the two traffic devices is clearly indicated; where an approximate rotary diameter is greater than 600 feet, an approximate roundabout diameter is less than 300 feet. |