Public Works

Roundabouts 

New Roundabout at Johnson Avenue and Wiley Blvd NW
As part of a road improvement project, a roundabout has recently been constructed at the intersection of Johnson Avenue and Wiley Blvd NW, adjacent to Hoover Elementary. The roundabout is a single-lane roundabout, and includes painted crosswalks, raised pedestrian splitter islands, and pedestrian beacons that flash when activated by a pushbutton.   

Driving a RoundaboutRendering depicting cars traveling counterclockwise through a roundabout

  1. Approach: Slow down. Yield to pedestrians.
  2. Enter: Yield to vehicles in the roundabout. Wait for a gap in traffic, and merge into traffic in a counterclockwise direction.
  3. Proceed: Continue through the roundabout until you reach your street. Never stop in the roundabout.
  4. Exit: Exit the roundabout to your right. Yield to pedestrians in the crosswalk.

Download a simple rendering on How To Drive a Roundabout. 

School Safety

The roundabout at Johnson and Wiley in front of Hoover Elementary is a mini roundabout, and has been designed specifically with the school in mind:

  • Pedestrian friendly, pushbutton system flashes when pedestrians are crossing
  • Crossing guards remain 
  • Pedestrians cross shorter distances
  • Pedestrians will only have to focus on one direction at a time
  • Refuge "island" for pedestrians to stand
  • Vehicles will be traveling at slower speeds than a traditional intersection
  • Pedestrians cross outside the circle 

Roundabout crosswalk rendering










Rendering above depicts typical single-lane roundabout with crosswalk.

Parent Resources

Please be patient and allow yourself extra time in the morning when arriving to Hoover Elementary. The intersection of Johnson Avenue and Wiley Blvd will be open as a roundabout. 

  • Arriving at school: Wiley Blvd is open, and access to the school is still available off Wiley Blvd at the school’s south entrance. Johnson Avenue is open between Jacolyn Drive and Wiley Blvd (coming from the west); but it is closed between the school and Edgewood Road (coming from the east).
  • Leaving school: The Johnson Avenue exit will be open. Parents can exit the school and turn left onto Johnson, leaving the area through the roundabout. 

Download Material

Videos

The video below shows an example of a similar roundabout near a school in Wisconsin. 

The simulation video below shows actual traffic volumes on Johnson Avenue NW and how the roundabouts will operate. 

 


What is a Roundabout?

A modern roundabout is an unsignalized, circular intersection engineered to maximize safety and minimize traffic delay. Fundamental characteristics of all roundabouts include:

  • Counterclockwise Flow. Traffic travels counterclockwise around a center island
  • Entry Yield Control. Vehicles entering the roundabout yield to traffic already circulating.
  • Low Speed. Curvature that results in lower vehicle speeds, generally 15-25 MPH, throughout the roundabout

(video courtesy of Insurance Institute for Highway Safety)

Benefits of Roundabouts

SAFETY

  • Eliminates head-on crashes and right-angle crashes
  • Decreases severity of crashes
  • Reduces speeds 

TRAFFIC FLOW

  • Can move more traffic during peak hours
  • Reduces stops
  • Reduces delays
  • Reduces congestion 

ENVIRONMENT & COMMUNITY LIVABILITY

  • Reduced emissions
  • Reduced fuel waste
  • Fewer hard stops
  • Landscaping and beautification / neighborhood aesthetics 

ECONOMICAL

  • Longer service life
  • No signal maintenance 
  • Better long-term economic value

Sources: Iowa Department of Transportation, Federal Highway Administration, Center for Transportation Research and Education

Resources on Roundabouts



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