Boulevards from Divided Highways

A boulevard is defined as a:

Walkable, low-speed (35 mph or less) divided arterial thoroughfare in urban environments designed to carry both through and local traffic, pedestrians and bicyclists. Boulevards may be long corridors, typically four lanes but sometimes wider, serve longer trips and provide pedestrian access to land. Boulevards may be high-ridership transit corridors. Boulevards are primary goods movement and emergency response routes and use vehicular and pedestrian access management techniques. Curb parking is encouraged on boulevards.

Source: Institute of Transportation Engineers, Designing Walkable Urban Thoroughfares: A Context Sensitive Approach, page 52, Table 4.2.

An eligible "boulevard" project should demonstrate some of the following elements:

Traffic calming measures.
Context-sensitive bicycle and pedestrian facilities.
Compliance with accessibility requirements and guidelines.
Promotion of transit corridor through additional protected stops and routes.
Environmentally efficient lighting, landscaping, and water-saving systems.

Examples
Several communities have created boulevards from divided highways, or have plans under consideration.

Disclaimer: The links and references from agencies and organizations outside the U.S. Department of Transportation are provided for information purposes only, and reflect the views of those agencies and organizations. Providing links and references to these resources does not represent endorsement by the U.S. Department of Transportation or the Federal Highway Administration.

Chattanooga transformed its Riverfront Parkway that had separated its downtown from the riverfront. See www.planning.dot.gov/Documents/DomesticScan/domscan2.htm.
Oklahoma City is considering enhancing its downtown core by transforming the former I-40 corridor into a pedestrian-friendly street that supports other downtown redevelopment initiatives, including a streetcar system and multimodal transportation hub. See www.okc.gov/planning/coretoshore/boulevard.html.
Philadelphia released the Philadelphia Complete Streets Design Handbook as a reference tool for designing boulevard projects.
Washington DC is transforming South Capitol Street and the Southeast/Southwest Freeway into boulevards to relieve local streets of interstate traffic and connect pedestrian and multimodal traffic on both sides of the Anacostia River.
The Institute of Transportation Engineers Designing Walkable Urban Thoroughfares: A Context Sensitive Approach provides concepts and principles to ensure the users, community, and other key factors are considered in the planning and design processes used to develop walkable urban thoroughfares.
The National Association of City Transportation Officials Urban Street Design Guide is a reference for boulevard and complete streets projects “to make streets safer, more livable, and more economically vibrant.”
Reconnecting America released “Are we there yet,” a reference guide for creating complete communities which has helpful boulevard design elements. See www.reconnectingamerica.org/resource-center/books-and-reports/2012/reconnecting-america-releases-are-we-there-yet-creating-complete-communities-for-21st-century-america/.
Other examples are available through Internet searches for "Highways to Boulevards" or "Freeway Removal".