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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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Added Capacity and Noise Walls - SR-527

Mill Creek, WA (Started 1990)

This project was developed to address congestion on a section of SR-527 between 164th Street SE and 132nd Street SE. SR 527 highway passes through downtown Mill Creek.

Bicycle Facilities: Bellevue, WA

Bellevue, WA

Bicycle lanes on a four-lane road with a diverter near transit stops. Bellevue has numerous bike lanes on many or most principal roads and many wetland and other trails.

East Main Street Reconstruction

Westminster, MD

After more than a year of planning and design, the Maryland State Highway Administration's consultants completed their drawings for Westminster, Maryland's, East Main Street's revitalization. However, the administration and public balked at the plan... more

Fernan Lake Road

(Started 2000, Completed 2006)

Fernan Lake Road is the primary recreational access to Fernan Lake in northern Idaho. It also provides access to residences, an established shooting range, and the Idaho Panhandle National Forest (IPNF) lands. The road is also used for commercial... more

Kentucky Proposed I-66

In 1997, the Kentucky Transportation Cabinet (KYTC) completed a study that concluded that the Southern Kentucky Corridor (I-66) was feasible. The Somerset to London segment of the I-66 corridor is home to many natural, scenic, and sensitive areas. It... more

Landscape and Interpretation Project, US-101

Raymond, WA (Started 1993-06, Completed 1993-11)

This project was part of Washington's scenic byways improvement program. It was a top priority for the city of Raymond to create a visually appealing community for travelers along US-101 and to introduce travelers to the unique Willapa basin, with... more

Minnesota TH 61: North Shore Scenic Drive

Minnesota TH 61 is as much a scenic highway and tourist destination as it is a vital interregional and international trade corridor for northeastern Minnesota along Lake Superior. When TH 61 required pavement replacement, MNDOT faced the challenge of... more

Paris Pike - Kentucky

Lexington-Paris, KY (Started 1997, Completed 2003)

Paris Pike is a US urban/rural primary route between the northern limits of Lexington and the southern limits of Paris, serving commuters as well as through travelers on a segment officially designated as a scenic route. The project involved... more

Route 215 - Ozark National Forest - Arkansas

(Started 1997, Completed 2003)

Route 215 is an improved 2-lane facility of approximately 15 miles in length following along the Mulberry River (providing a scenic overlook) with its steep slopes and providing access to the Redding and Wolfpen Campgrounds in the White Rock Wildlife... more

Route 29 - Trenton, New Jersey

Trenton, NJ (Started 1996-01, Completed 2002-03)

The project is known as the Route 29 Highway Tunnel. There were many context sensitive factors in this project stemming from the project location that impacted residences in two historic districts and the National Register Riverview Cemetery and... more

Route 61, North Shore Scenic Drive - Minnesota

Minnesotaメs Truck Highway 61, North Shore Scenic Drive, runs northeasterly along the rock and heavily forested edge of Lake Superior, for than 150 miles, from the regional trade center of Duluth to Canada. TH 61 is both a scenic highway as well as a... more

Smith Creek Parkway - North Carolina

Wilmington, NC

The Smith Creek Parkway project of seven plus miles has been a priority since 1972 with the original environmental impact study of alternatives being completed in the 70's. The project was divided into four sections and the two eastern most sections... more

SR 520 Bridge Replacement and HOV Project

Seattle to Bellevue, WA (Started 1999, Completed 2017)

SR 520 links densely populated cities and some of the largest employers in the state. The one-and-a-half-mile long, 42 year-old SR 520 Evergreen Point Bridge is very vulnerable to windstorms and earthquakes and needs to be replaced.

State Route 68 - Arizona

(Started 2000-09, Completed 2002-12)

The project involved reconstruction and widening of a 13.5-mile of an existing two-lane road into a four-lane roadway. The State Route 68 project was built utilizing a design-build contracting method. Design-build is a relatively new approach to... more

State Route 89--Emerald Bay, South Lake Tahoe

El Dorado County, CA (Started 1992-04, Completed 1993-10)

Construction of this project involved a stretch of State Route 89 along Emerald Bay near Cascade Lake and Eagle Falls on the southwestern shore of Lake Tahoe, CA. The purpose of this project was to upgrade a stretch of the existing narrow two-lane... more

US Highway 14/16/20 (Yellowstone to Cody)

In order to accommodate tourist traffic to Yellowstone National Park and address highway safety issues, WYDOT widened, realigned and resurfaced US 14/16/20. Particular care was taken to avoid impact, or remediate damage, to the project area's natural... more

U.S. Route 3

Port Ontario, NY

U.S. Route 3 runs north-south between the shore of the east end of Lake Ontario and Interstate 81 in New York State. Route 3 is a two-lane rural highway that passes through many old downtowns and small villages. The route is part of the Seaway... more