Case Studies

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

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Canal Parkway, from Wiley Ford Bridge to MD 51

Canal Parkway, from Wiley Ford Bridge to MD 51

Cumberland, MD (Started 1989, Completed 2001)

Prior to this roadway project, severe traffic congestion occurred daily at the Virginia Avenue underpass (locally known as the "subway") of CSXT tracks and its intersection with MD 51. When this facility was blocked (by accidents or flooding) there... more

The purpose of the project was to replace two existing functionally obsolete truss bridges crossing the Cooper River in Charleston Harbor.

Cooper River Bridge Replacement Project

Charleston Harbor, SC

The purpose of the project was to replace two existing functionally obsolete truss bridges crossing the Cooper River in Charleston Harbor. The new structure would need to 1) Increase the capacity of US 17 over the Cooper River, 2) Improved traffic... more

Danville-Riverside Bridge and Approach - Pennsylvania

Danville-Riverside Bridge and Approach - Pennsylvania

Danville-Riverside, PA (Started 1991, Completed 2000)

The project involved replacement of an existing two-lane Parker Through Truss bridge built in 1904 spanning the Susquehanna River, with a new 1,440 foot-long bridge with weathered steel haunched girders. The approach to the old bridge from Danville... more

Highway through Mutzig, France

Highway through Mutzig, France


"Mutzig is one of the many beautiful towns in Alsace, and the conversion that was made of the main street in the 1980s lives up completely to the inherent charm of the town."

Historic Columbia River Parkway

Historic Columbia River Parkway

Columbia River Gorge, OR

The first paved highway in the northwestern United States, the Columbia River Highway was conceived, designed, and constructed as both a scenic attraction and as a means of facilitating economic development along the Columbia River corridor between... more

Indianapolis Cultural Trail

Indianapolis, IN (Started 2000, Completed 2013-05)

Leaders in the city of Indianapolis, Indiana, wanted to make it easier for people to visit the city’s cultural districts, which were disconnected from the heart of downtown and didn’t get the attention they merited. In a city with a successful... more

M-119: Special Guardrail

Harbor Springs, MI (Started 2002-12, Completed 2003)

M-119 is located in Emmet County, north of Harbor Springs and adjacent to Lake Michigan. The road meanders along the shoreline offering the traveler spectacular views of the lake and the Beaver Island archipelago.

The purpose of... more

M-72/ M-33 Mio: Slope Improvements

Mio, MI

The project location was at the northwest corner of the M-72/M-33 intersection in the community of Mio. The intersection has the only traffic signal in Oscoda County. The county is a popular destination for canoeing and fishing on the AuSable... more

Merritt Parkway Gateway Project

Merritt Parkway Gateway Project

Greenwich, CT

Since its opening in 1940, the Merritt Parkway has been recognized not only as an essential component of Connecticut's transportation system but as an asset with unique design features and scenic character. During the 1990s, ConnDOT sought to improve... more

Merritt Parkway: Greenwich, Connecticut

Merritt Parkway: Greenwich, Connecticut

Greenwich, CT (Started 1992, Completed 1997)

Much has been written and reported about the safety improvements and landscape restoration of the Merritt Parkway which started in the 1990s in Greenwich, Connecticut, a unique community that shaped the approach that was ultimately taken to improve... more

Retaining walls in Provo Canyon

Retaining walls in Provo Canyon

Retaining walls built in Provo Canyon

Shopping Street in Assens

Shopping Street in Assens

Assens (Started 1990, Completed 1993)

"As part of the 'More Beautiful Streets' project in which the Road Directorate in cooperation with local authorities carry out traffic calming projects with a particular emphasis on the visual environment, the main street in Assens has been converted... more

Shopping Street in Hjorring, Denmark

Shopping Street in Hjorring, Denmark

Hjorring (Started 1987, Completed 1992)

On the town's main shopping street "traffic is now to a large degree governed on the terms of the light road users. The establishment of the first 350 m of a total of 750 m pedestrian street and 30 km/h streets was made financially feasible by the... more

State Route 89--Emerald Bay, South Lake Tahoe

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

The Danville Project

Montpelier, VT (Started 2000, Completed 2010)

The Danville Transportation Enhancement Project is a partnership among the Vermont Arts Council, the Vermont Agency of Transportation [VTrans], and the Town of Danville, Vermont designed to integrate artistic enhancements into the redevelopment of a... more

Town Street in Naestved, Denmark

Town Street in Naestved, Denmark

Naevstved (Started 1991)

"As part of an extensive reconstruction of the street network in the town center of Naestved, Ramsherred has been converted to a pedestrian street with one-way business-related motor car traffic allowed. What used to be an ordinary town street with... more

US-23 Cheboygan: Drawbridge Rehabilitation

Cheboygan, MI (Started 2004-01, Completed 2004-06)

The US-23/State Street Bascule (drawbridge) is located in the city of Cheboygan in Cheboygan County.

The National Register listed bridge was completed in December of 1940 and was the last Bascule bridge built in Michigan before World... more

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