USA Banner

Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

Research

Subscribe to RSS
Left Nav - R&T TFHRC
Research
31

Geometric Design Laboratory Overview

Purpose

The mission of the Geometric Design Laboratory (GDL) is to support the Office of Safety Research and Development in research related to the geometric design of roadways and the impacts on safety. The GDL provides technical support to develop, maintain, and enhance tools for the safety evaluation of highway geometric design alternatives. This includes coordination of the Highway Safety Manual (HSM) with related tools, e.g., the Interactive Highway Safety Design Model (IHSDM).

Federal Outdoor Impact Laboratory Overview

car crash into guardrail barrier

Purpose

The Federal Outdoor Impact Laboratory (FOIL) is an ISO17025-accredited (Cert. # AT-1565) research facility used to support the Federal Highway Administration's Safety Research and Development programs and other Federal security initiatives.

Research What's New 2025

We are committed to providing our visitors with useful and updated information. We invite you to visit this page frequently to see what items have been added or updated on the Turner-Fairbank Highway Research Center Web site.