IBF Urban Planning, Facilities Design and Policy Page
The Bike People On-line magazine with growing archive of article on practical design topics.
Bike Plan Source Hard information to use to make your community a better place for bicycling.
Center for Livable Communities. Helping local governments and community leaders be proactive in their land use and transportation planning, and adopt programs and policies that lead to more livable and resource-efficient land use patterns.
CIVITAS A European Commission supported initiative to help introduce sustainable urban transport strategies.
Conservation Law Foundation/Transportation Resource for people working to create more livable communities by improving transportation. Their work is broad in scope and typically involves issues of transportation, development, urban livability, and environmental justice.
Cycling Digest: Papers and information about cycling and cycle planning
Dilemma Of Bicycle Planning Paper on the topic of bicycle facilities planning.
Economic Impact of Bicycle Facilities: A Case Study (Outer Banks, NC)
Environmental Justice Resource Center Publishes the Transportation Equity Newsletter, which is devoted to race, disability, and transportation.
Global Transport Knowledge Partnership Disseminate sustainable transport knowledge, whilst encouraging greater participation from the developing world.
Great Street  1,000 images of great street designs,  and the 'Main Street Profiles' section has 12 main street success stories.
Moving the Economy  Information on how to apply sustainable transportation principles to help reduce traffic congestion, facility costs, pollution and other transport problems.
Narrow Streets Database Information on traffic calming on residential streets.
Planning For Bicycling Quick discussion supporting wide vehicle lanes for shared use.
Planning For Sustainability American Planning Association Policy Guide.
Price of Mobility A report that attempts to quantify the hidden subsidies that drivers receive.
Road Peace
Smart Growth America A nationwide coalition promoting new development patterns that protect farmland and open space, revitalize neighborhoods, keeps housing affordable, and provides more transportation choices.
Surface Transportation Policy The resources and contacts you are looking for to become involved in transportation, community and environmental policy.
TrafficLinq  Directory with links to sites on ITS, public transport, transportation planning, traffic engineering, sustainable mobility, congestion pricing, traffic information, parking, traffic safety, bicycling, commuting, software, organizations and traffic industry. 
Travel Matters Individual emissions calculator
Technical Transportation Land-Use Modeling Tool for transportation and land use forecasting in urban areas.
Terrain: A Journal of the Built & Natural Environments
Transport Geography on the Web Provides access to transport geography information, including academic articles, maps, figures, and datatsets.
Transport Research Laboratory 
Transportation, and the Challenge to Sprawl  Sierra Club resources.
Transportation, Land Use and Sustainability Relevant material collected at the University of South Florida
Transportation Research Board Searchable archive with hundreds of articles on NMT, mostly engineering.
Urban Ecology Web Magazine  Grow collection of articles and links on a wide range of issues that affect development behavior.
UrbanSim Tool for modeling urban growth. 
Victoria Transport Policy Institute Offers a variety of information and tools for quantifying transportation.
Virtual Library on Urban Environmental Management

For information specific to U.S. federal funding of bicycle facilities see the following:

Surface Transportation Policy Project
U.S. EPA's Transportation Partners
U.S. Department of Transportation
Federal Highway Administration

List of “Best Practices” Web Sites and Programs
(From www.EcoPlan.org )