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Case Studies

This database includes both Case Studies that have been described in official publications (in pink), and Projects that have been posted here by aboutcss.org site members (in red). To search for a particular project, enter a keyword or click on "Advanced Search."

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3500 South EIS, Redwood Road to 8400 West

(Started 2002-03, Completed 2007)

Purpose and Need Problems and needs identified by the entire project team, including community are best seen on the attached pdf.

The Purpose and Need statement was developed through a collaborative effort between local... more

Aesthetic and Safety Improvement, SR-99

Des Moines, WA (Started 1997, Completed 2005)

The purpose of the project is to improve traffic congestion, operations, and safety; provide facilities for transit and pedestrians; and encourage economic redevelopment along the SR-99 corridor through the city of Des Moines.

Bicycle Lanes in Portland, OR

Portland, OR

Bicycle lane on Broadway; a multi-lane road. Portland's got it all - bike lanes, reduced lane widths, bicycle parking, floating pontoon trails, and many exceptional inventions.

Bridgeport Way - University Place, Washington

University Place, WA (Started 1998-05, Completed 2002-06)

Bridgeport Way is a major urban arterial and it could be considered as a "Main Street" of University Place. The project involved reconstruction of an existing five-lane road into a four-lane divided roadway over a distance of approximately 1.5... more

Crosswalks: Toucan Crossings, Tucson, AZ

Tucson, AZ

At these half-signal concept Toucan Crossings in Tucson, AZ, motorists stop for short periods to allow bicyclists and pedestrians highly efficient crossings. A pedestrian island, sometimes covered, forces cars to turn right, while allowing safe... more

Edgewater Drive Before & After Re-Striping Results

College Park, FL (Started 2000, Completed 2001)

"The previous 4-lane configuration of Edgewater Drive [20,000 ADT] did not provide sufficient room for wider sidewalks, bicycle lanes, streetscape and other [neighborhood improvement plan] tasks. The [plan] identified that the only way to eventually... more

Highway through Aabenraa, Denmark

Aabenraa (Started 1991)

"The three-km-long, heavily trafficked highway through Aabenraa has been converted according to the principles of environmentally adapted through roads, with due respect paid, however, to the substantial traffic flow. This has reduced car speeds, has... more

Highway through Arnage, France

Arnage (Started 1988)

"In Arnage, a suburb of Le Mans, the heavily trafficked main street has been rebuilt in order to improve both traffic safety and the quality of the urban environment."

Intersection: Brighton, Michigan

Brighton, MI

Large intersection with medians, pork chop islands. New design reduced crashes 60%.

Intersection: Holland, Michigan

Holland, MI

This shopping street joins and crosses an arterial, and honors pedestrian movements.

Intersection: Kirkland, Washington

Kirkland, WA

Crosswalks enhance a vibrant shopping street and handle a steady flow of people and cars.

Intersection: Newport, Rhode Island

Newport, RI

At this large downtown intersection, medians and some median noses were used to make it more pedestrian friendly.

Lake Worth, Florida

Lake Worth, FL (Started 1994, Completed 1998)

"Florida DOT, working with Lake Worth planners, conducted an experiment: using only paint, two principal downtown streets were significantly narrowed to two lanes with the third lane striped for parking. When accident rates fell by over 44 percent... more

Maryland Route 355

Montgomery County, MD

Significant regional traffic growth and localized development has resulted in traffic increases along Route 355, a two-lane highway in rural and suburban Maryland. Completion of this mobility-enhancing project required a comprehensive approach... more

Mid-block Crosswalks: Bridgeport Way, University Place, WA

University Place, WA

Bridgeport Way is a busy boulevard with a very thin median. Many of its crosswalks are signal controlled with high quality signs, markings and pavings, and lighting.

Oyster River Roundabout

West Haven, CT

Traffic volume, accident rate and pedestrian concerns required improvement of the intersection.

Shopping Street in Vordingborg, Denmark

Vordingborg (Started 1990, Completed 1992)

"The main shopping street in Vordingborg, Algade, has been converted from a one-way street to partly a pedestrian street, partly a 30 km/h street with commercial traffic allowed in both directions. The conversion has embellished the street and... more

Washington, D.C.: Pennsylvania Ave. and 9th Street

Washington, DC

Washington, DC, has many good intersections, with tight lanes and exceptional attention to details. This one features turn lanes for buses, but is pedestrian friendly.

Washington SR 99 - International Boulevard

Seattle-Tacoma, WA

International Boulevard is a major N/S arterial that serves local and regional traffic within Seattle-Tacoma, Washington. The Incorporated City of SeaTac developed Comprehensive and Transportation Plans that established land-use goals and proposed... more

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