Federal CSS Information
The federal government, through the Federal Highway Administration (FHWA), is encouraging states to adopt the CSS approach to transportation planning and design.
The FHWA implemented, in 1997, a pilot project for CSS, using CSS techniques on transportation projects in five states across the country: Kentucky, Utah, Minnesota, Maryland, and Connecticut. (Please visit the FHWA's CSS website for further details.) All of these states have since adopted the CSS approach in their transportation decision-making.
Currently, 43 out of the 50 states have some sort of CSS policy or program.
The FHWA has published a guidebook for using the CSS approach and techniques. View the FHWA's explanation and definition of CSS, Flexibility in Highway Design.