Logo

13- Roundabouts & Diverging Diamond Intersections

Drivers Icon Teaching Your Teen to Drive

Roundabouts

Roundabouts are a safer, more cost-effective way to build some intersections. By keeping traffic moving and requiring fewer stops and starts than conventional intersections, roundabouts reduce crashes, delays and congestion, resulting in drops in fuel consumption and emissions.

Traffic moves at slow speeds in a counterclockwise direction, and is constantly moving except when yielding to traffic in the roundabout and pedestrians in the crosswalks.

This example shows the traffic movement patterns through a one-lane roundabout. The one-lane roundabout is known as one of the safest and most efficient intersections.

 

To navigate a roundabout:

  • Slow down as you approach the roundabout and yield to pedestrians and traffic already in the roundabout;
  • Look to the left, wait for a gap in traffic and merge into the roundabout;
  • Once in the roundabout, keep moving, don’t stop;
  • Proceed to your exit, use your turn signal to indicate you are leaving the roundabout and yield to pedestrians as you leave the roundabout;
  • Pedestrians should cross only in crosswalks

Diverging Diamond

The Diverging diamond in Cheyenne significantly reduces delays for vehicles entering and exiting the interstate at this interchange as well as cuts the number of traffic conflict points. To navigate the diverging diamond:

Traveling on College Drive

Accessing Southbound I-25: If driving east toward the interchange, get into the far right lane and merge onto I-25. If driving west, get into the far left lane. Continue over the bridge and merge directly onto I-25.

Accessing Northbound I-25: If driving east, move into the left lane. Continue over the bridge and move into the left-turn lane, which will merge directly onto I-25. If driving west, move into the right lane and merge onto I-25.

Going Straight: Using any of the two regular traffic lanes, continue through the next crossing intersection where you will switch back to the right side of the roadway.

Traveling on I-25

Northbound Etchepare Dr./Cir.: Stay to the left off-ramp divides. Turn left and merge directly into westbound traffic lanes.

Northbound to Southwest Drive: Stay to the right when the off-ramp divides. Turn right and merge directly into the westbound traffic lanes.

Southbound to Etchepare Dr./Cir.: Stay to the right when the off ramp divides. Turn right and merge directly into the westbound traffic lanes.

Southbound to Southwest Drive: Stay to the left when the off-ramp divides. Turn left and merge into the eastbound traffic lanes.

Yield the Right-of-Way

As a rule of thumb, when entering or driving a roundabout, always yield to traffic on your left.