Police say there are 3 common mistakes when navigating roundabouts:
1. Failing to yield to traffic already in the roundabout
2. Changing lanes in the roundabout
3. Attempting to make a left from the right-hand lane when you're supposed to go right or straight.
Diagram from Colorado Driver Handbook page 20 https://www.colorado.gov/pacific/sites/default/files/DriverHandbook.pdf
1. Failing to yield to traffic already in the roundabout
2. Changing lanes in the roundabout
3. Attempting to make a left from the right-hand lane when you're supposed to go right or straight.
Diagram from Colorado Driver Handbook page 20 https://www.colorado.gov/pacific/sites/default/files/DriverHandbook.pdf