Completed Projects by Location

Existing Roundabouts designed by Ourston Roundabout Engineering, Inc. or Ourston Roundabouts Canada are listed below. Many of the roundabouts are on highways, at interchanges, or in succession along corridors, and have entries on one or more high-speed approaches.

For in-depth information on some of the important roundabout designs we have completed, please view our case studies. For more information on these and other projects we have done, please Contact Us.

Click on the projects below for a description and associated design drawings or images. You can also sort projects by date.

Projects in the USA by State

SR 89 / Road 4 South, 2009 (Chino Valley, AZ)

Intersection Control Study and construction of a two-lane roundabout

SR 179 Corridor, 2009 (Oak Creek & Sedona, AZ)

Eleven roundabouts along a nine-mile stretch of SR 179 - a “distinct and diverse road" designated by the U.S. DOT.

I-19/Canoa Ranch Interchange, 2009 (Pima County, AZ)

Design review of the roundabouts at the interchange of I-19 and Canoa Ranch Road

Los Alamitos Circle, 2006 (Long Beach, CA)

Alternative improvement concepts and marking options for a very large four-leg urban hybrid (1934 traffic circle/1992 roundabout).

Veterans Memorial, 2010 (Los Angeles, CA)

Initial study and final design for a five-leg roundabout with a landscaped center island.

I-70 / Edwards Interchange, 2008 (Edwards, CO)

Design and review of a roundabout interchange to ensure the proper implementation of roundabout technology.

Cony Rotary, 2009 (Augusta, ME)

Rotary converted to adhere to modern roundabout operating characteristics, addressing safety and capacity limitations.

Britton Parkway, 2006 (Hilliard, OH)

3 roundabout corridor extension for Britton Parkway into a prestige office employment area.

Balch Springs Roundabout, 2010 (Dallas County, TX)

Five-leg, multi-lane roundabout with extensive public involvement

STH 114 / Winneconne Ave., In Progress (Neenah, WI)

Feasibility study and final design of four roundabouts in a high traffic area with tight right-of-way constraints.

Marquette Road Roundabouts, 2008 (Prairie du Chien, WI)

Design and review of three closely spaced roundabout intersections

STH 164/CTH Q Intersection, 2009 (Washington County, WI)

Rural high speed intersection redesigned for crash reduction.

US 41 Roundabouts, In Progress (Winnebago County, WI)

Design and construction of sixteen multilane roundabouts along USH 41 from STH 26 to Breezewood Lane

E. Pershing Blvd Corridor, In Progress (Cheyenne, WY)

Design of a five-legged, two-lane modern roundabout to address safety concerns.

Projects in Canada by Province

Highway 20 at Highway 11A, 2008 (Sylvan Lake, AB)

Roundabout constructed to form a gateway between the resort town of Sylvan Lake and the high-speed rural road network to the east.

McCallum Road Interchange, In Progress (Abbotsford, BC)

Two multi-lane roundabouts to replace the existing McCallum Road interchange at Highway 1.

Armdale Rotary, 2008 (Halifax, NS)

Five leg rotary modified to conform to modern roundabout principles.

Larry Uteck Boulevard Interchange, In Progress (Halifax, NS)

Three multilane roundabouts along Larry Uteck Boulevard – a new corridor north of Halifax.

Wilson St / Meadowbrook Dr, 2002 (Ancaster, ON)

Single-lane roundabout located between the low-speed village of Ancaster and the high-speed approach from Highway 403.

Highway 33 at County Road 1, 2009 (Picton, ON)

Re-design of an intersection west of Picton due to a history of injury and fatal crashes.

Arthur Street at Sawmill Road, 2006 (Region of Waterloo, ON)

The Arthur Street at Sawmill Road multi-lane roundabout is located on a high-speed road (posted 80 km/h) near the tourist destination of St. Jacobs.

Bridge Street at Lancaster Street, 2009 (Region of Waterloo, ON)

Compact multi-lane design with spiral markings.

Ira Needles Blvd, 2004 (Waterloo Region, ON)

Six roundabout corridor - first roundabout completed in 2004 with others in construction.

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