General

Legacy ID

History of FHWA

NOTE: Articles from Public Roads magazine are not presently available on the FHWA website. You can...

Federal-aid Legislation

NOTE: Articles from Public Roads magazine are not presently available on the FHWA website. You can...

The Interstate System

NOTE: Articles from Public Roads magazine are not presently available on the FHWA website. You can...

Highway History

painting of old cars

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Interactive Highway Safety Design Model (IHSDM): User Applications and Case Studies

Over the past 2 decades, State and local agencies—and their consultants—the Federal Highway Administration’s (FHWA) Office of Federal Lands Highway, and many others have used IHSDM for a host of applications. This page provides summaries of select applications/case studies.

State Resources

For Local Information: Consult Your FHWA Division Office for State Resources

Your FHWA Division will provide the contacts to access the following State Resources: Links to local program websites, manuals and references, Local Technical Assistance Program (LTAP) centers, and local...