Selah Loop & Gore Road Roundabout – Yakima County, WA
Parametrix conducted an intersection alternative analysis for the intersection of Selah Loop and Gore Road to identify future lane configuration requirements to meet 20-year traffic growth projections. The County selected a modern roundabout alternative and Parametrix has completed the preliminary design for the roundabout improvements.

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Yelm Highway Corridor – Thurston County, WA
Parametrix is providing final design, right-of-way plans, and PS&E for the widening of Yelm Highway from two to five lanes from Henderson Boulevard to Rich Road, approximately 6,000 feet. The design includes two roundabouts, one replacing an existing signal. Project elements include alignment options, public presentation of options, right-of-way plans, biological and environmental assessment and cost estimates.

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45th Avenue Roadway and Roundabout Design – Lacey, WA
45th Avenue, from College Street to Ruddell Road, was a two-lane city neighborhood collector street approximately 3/4-mile in length. This stretch of roadway was improved to include left-turn lanes into existing subdivisions, curb and gutter, sidewalks, bike lanes, street lighting, storm drainage, landscaping and irrigation, and underground of private utilities.

In addition to the roadway improvements, a two-lane modern roundabout was constructed at the intersection of 45th Avenue and College Street. As well as preparing PS&E for the roadway project, we prepared a separate set of plans for the roundabout, including roadway and storm drainage design, street lighting design, and landscape and irrigation design.

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Highland/Siskiyou Intersection Improvements – Medford, OR
Parametrix worked with the City to determine the most appropriate intersection control device for this suburban intersection. Both a signalized intersection and a modern roundabout were considered. Several elements, including operations, safety, access, and ROW impacts were considered. A major element of the project is an outreach and education program with the local community. The City selected a roundabout alternative and Parametrix is currently completing the final design.

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Littlerock Road Corridor Improvements – Tumwater, WA
In 1997, the City of Tumwater adopted a Supplemental Environmental Impact Statement (SEIS) for the Littlerock Road SubArea Plan. The recommended plan included “substantial intervention” for Littlerock Road, including developing the roadway as a median-divided, tree-lined boulevard. The plan also called for incremental development of a frontage road, which would relieve Littlerock of much of the future development traffic. An internal roadway grid network, streetscape, and pedestrian improvements were also recommended. In 1999, the City received a grant to proceed with design and construction of the improvements to Littlerock Road. Parametrix managed the corridor development process, which included a design fair, focus groups for commercial and residential interests, and a design charrette. Special focus in outreach centered on educating the public and an advisory on the use of roundabouts on an arterial corridor. Recommendations from the public process were summarized in a Corridor Development Plan that includes the opening year and 2020 transportation blueprints, streetscape features, and land use issues.

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Bethel Road Corridor Improvements – Port Orchard, WA
Parametrix managed and designed the Bethel Road Corridor project. Bethel Road is a commercially zoned corridor in south Kitsap County. Current land uses along the roadway range from residential to retail. In recent years, commercial development has begun to spring up along the corridor, site by site, with no plan for the corridor as whole. Compounding this is ever-increasing traffic and the acknowledgement that widening or other improvements would be necessary to accommodate future traffic volumes. In order to guide commercial development, rather than allow development to drive roadway improvements, Kitsap County felt a more comprehensive process was needed. The first phase of this process evolved into a Corridor Development Plan, and is the first such plan to be produced for a county roadway. There are four components to the plan: land use, transportation, street, and environmental.

The next major phase of this project was the design of the roadway improvements. The design elements include a four lane roadway with a landscaped median with turning pockets, two new signalized intersections, one signal upgrade, and two modern roundabouts. The completed project will result in a new 1.5 mile improved corridor that will accommodate future motorized and non-motorized traffic for many years. Recipient of the 2000 APA Transportation Planning Award for Outreach.

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Evergreen Parkway Improvements – Olympia, WA
Parametrix designed improvements to Evergreen Parkway, including a roundabout at McCann Plaza and Overhulse Drive. The improvements, which include a non-motorized pathway and planter strip, significantly reduced the total impervious area of the parkway, which was converted from two lanes in each direction to a single lane. The conversion meets Evergreen State College’s goal of sustainability and environmental stewardship by eliminating the travel lane and replacing it with facilities for pedestrians and cyclists, as well as creating a new planter strip area. These improvements also serve to slow and calm traffic, since speeding on the parkway is a major safety concern. Parametrix also provided full construction management services. Recipient of the 2005 WSDOT Pedestrian Safety Enhancement Award.

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